ESI Audio Xsynth Portable synthesizer User Manual

Press a key on Xsynth and hold it while gradually increasing the
volume to about 50%. Adjust the input volume of your mixer/audio
interface to hear Xsynth clearly.

3.3 Using the Keyboard

If using MIDI In or Out, activate it in the GLOBAL settings by
pressing MACRO and GLOBAL to access the MIDI CC page. The four
encoders on the left side of the display will transmit CC messages
when turned.

3.4 Using the Audio Interface

Connect Xsynth to your computer via USB for automatic
recognition as an audio interface and MIDI interface. Connect
external signals to AUX IN and output to LINE OUT or PHONES.
Activate the audio interface in GLOBAL settings.

3.5 How to Update

Download the Editor and latest firmware from esi-audio.com. Open
the Editor and navigate to Global > Update firmware. Select the
update file, click OK, and monitor the progress bar on your
computer as Xsynth may not display anything. Wait for the process
to complete (may take 15 minutes or more).

FAQ:

Q: Can I use the sounds of Xsynth for commercial purposes?

A: Yes, you can use the sounds of Xsynth royalty-free for both
commercial and noncommercial uses.

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© ESI Audiotechnik GmbH
All rights reserved.
Sounds of Xsynth can be used royalty-free for commercial and noncommercial uses.
Manual v. 1.1 04 Feb 2025

Xsynth
Portable synthesizer with master keyboard,
MIDI interface and audio interface
User Manual

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Index? [REMOVE THIS PARAGRAPH, ENDING HERE] 2 – – Xsynth Manual

1. Table of contents
This table of contents features clickable hyperlinks in the PDF version, which will take you directly to the desired chapter. In addition, there are clickable cross references throughout the manual. Also, the Search function of your PDF reader can be used in this document. You will have to find the easter eggs yourself though.
1. Table of contents…………………………………………………………………………………………………………………………………………………… 3 2. Introduction…………………………………………………………………………………………………………………………………………………………. 7 3. Quickstart……………………………………………………………………………………………………………………………………………………………. 7
3.1 Setup…………………………………………………………………………………………………………………………………………………………………………………….7 3.2 Using the Synthesizer…………………………………………………………………………………………………………………………………………………………….8 3.3 Using the Keyboard………………………………………………………………………………………………………………………………………………………………..8 3.4 Using the Audio interface:………………………………………………………………………………………………………………………………………………………9 3.5 How to update……………………………………………………………………………………………………………………………………………………………………….9 4. Troubleshooting………………………………………………………………………………………………………………………………………………….. 10 Technical Specifications…………………………………………………………………………………………………………………………………………… 15 5. General Overview…………………………………………………………………………………………………………………………………………………. 17 6. Synth engine schematic diagram……………………………………………………………………………………………………………………………..18 Operation Instructions……………………………………………………………………………………………………………………………………………… 19 6.1 How to understand this manual…………………………………………………………………………………………………………………………………………… 19 6.2 Getting started…………………………………………………………………………………………………………………………………………………………………….20 7. Connections……………………………………………………………………………………………………………………………………………………….. 22 7.1 Connection types and signal directions…………………………………………………………………………………………………………………………………22 7.2 USB connection………………………………………………………………………………………………………………………………………………………………….. 24 8. General controls, display……………………………………………………………………………………………………………………………………….. 24
Table of contents – Xsynth Manual – 3

9. Keyboard and controls………………………………………………………………………………………………………………………………………….. 25 9.1 Velocity, Polyphonic Aftertouch…………………………………………………………………………………………………………………………………………….25 9.2 Keyboard control buttons……………………………………………………………………………………………………………………………………………………..26 9.3 MIDI PANIC………………………………………………………………………………………………………………………………………………………………………….27
10. Arpeggiator………………………………………………………………………………………………………………………………………………………. 27 11. Display Parameters…………………………………………………………………………………………………………………………………………….. 28 CC Send………………………………………………………………………………………………………………………………………………………………… 28
11.1 List of default CC numbers………………………………………………………………………………………………………………………………………………… 29 12. Oscillators………………………………………………………………………………………………………………………………………………………… 30
12.1 Introduction……………………………………………………………………………………………………………………………………………………………………….30 12.2 Walkthrough………………………………………………………………………………………………………………………………………………………………………30 12.3 Common features………………………………………………………………………………………………………………………………………………………………31 12.4 Osc Global features…………………………………………………………………………………………………………………………………………………………… 31 13. Envelopes…………………………………………………………………………………………………………………………………………………………. 32 13.1 Overview……………………………………………………………………………………………………………………………………………………………………………32 13.2 Function…………………………………………………………………………………………………………………………………………………………………………… 32 13.3 Walkthrough………………………………………………………………………………………………………………………………………………………………………34 14. LFOs……………………………………………………………………………………………………………………………………………………………….. 36 15. Macro……………………………………………………………………………………………………………………………………………………………… 37 16. Filter……………………………………………………………………………………………………………………………………………………………….. 38 16.1 Introduction……………………………………………………………………………………………………………………………………………………………………….38 16.2 Cutoff………………………………………………………………………………………………………………………………………………………………………………..41 16.3 Resonance……………………………………………………………………………………………………………………………………………………………………….. 41 16.4 12dB or 24dB slope?…………………………………………………………………………………………………………………………………………………………..41 16.5 Modes……………………………………………………………………………………………………………………………………………………………………………….43
4 – Table of contents – Xsynth Manual

Keytrack (KTrck)………………………………………………………………………………………………………………………………………………………………………..44 16.6 Walkthrough………………………………………………………………………………………………………………………………………………………………………44 17. Mixer………………………………………………………………………………………………………………………………………………………………. 46 18. Effects/Aux………………………………………………………………………………………………………………………………………………………. 47 18.1 FX1 Insert effects……………………………………………………………………………………………………………………………………………………………47 18.2 FX2 Reverb……………………………………………………………………………………………………………………………………………………………………. 48 18.3 FX3 Chorus/Flanger/Delay………………………………………………………………………………………………………………………………………………48 PatchVol………………………………………………………………………………………………………………………………………………………………………………….. 48 19. Modulation Matrix……………………………………………………………………………………………………………………………………………… 49 19.1 Sources……………………………………………………………………………………………………………………………………………………………………………. 49 19.2 Destinations………………………………………………………………………………………………………………………………………………………………………50 19.3 Walkthrough………………………………………………………………………………………………………………………………………………………………………51 20. GLOBAL menu/system settings, Init patch……………………………………………………………………………………………………………….. 52 21. Saving Patches………………………………………………………………………………………………………………………………………………….. 54 22. MIDI………………………………………………………………………………………………………………………………………………………………… 56 22.1 Introduction……………………………………………………………………………………………………………………………………………………………………….56 22.2 Connecting MIDI, signal directions………………………………………………………………………………………………………………………………………57 22.3 MIDI Interface…………………………………………………………………………………………………………………………………………………………………… 57 22.4 Settings, Avoiding MIDI feedback (Local On/Off)………………………………………………………………………………………………………………….58 22.5 MIDI Implementation Description………………………………………………………………………………………………………………………………………..59 23. Editor………………………………………………………………………………………………………………………………………………………………. 60 23.1 Handling……………………………………………………………………………………………………………………………………………………………………………61 23.2 Pages………………………………………………………………………………………………………………………………………………………………………………..61 Appendix……………………………………………………………………………………………………………………………………………………………….. 64 24. Legal note………………………………………………………………………………………………………………………………………………………… 70
Table of contents – Xsynth Manual – 5

6 – Table of contents – Xsynth Manual

2. Introduction
Welcome to Xsynth! A portable synthesizer, based on the Xkey series, fitted with a MIDI and Audio interface. Perfect for mobile use and fulfilling ideas, wherever you go. This manual is written for beginners and more experienced users alike. Synth veterans can skip the Walkthrough sections of this manual. We kindly ask you to read as much as possible before you start working. Please read at least the Quickstart, Troubleshooting and the NOTE: sections of the manual. Furthermore, we gave our best to keep it short. Plus, we have hidden some easter eggs in here. Many common questions are answered in this manual. Please try finding an answer in this document before you contact our support team.
3. Quickstart
3.1 Setup
Put Xsynth on a flat, stable and clean surface. Connect your cables first before starting the device: Line out Mixer/Audio Interface input External line level audio signal Aux In Phones Headphones Xsynth MIDI Out External synthesizer/keyboard MIDI In External synthesizer/keyboard MIDI Out Xsynth MIDI In DIN MIDI ports use TRS A pin layout. Use a TRS A to 5pol DIN adapter if needed. USB transmits power, MIDI and audio.
Turn the input volume of the mixer channel/audio interface that Xsynth is conected to all the way down. Then, start Xsynth by turning up the I/O Volume potentiometer in the upper left corner.
Quickstart – Xsynth Manual – 7

Press one of the keys of Xsynth and hold it while slowly turning up the volume of Xsynth to about 50%. Then, keep the key pressed and turn up the input volume of your mixer/audio interface so you can hear Xsynth clearly.
3.2 Using the Synthesizer
Turn the Patch Select encoder on the upper right corner of the device to change through patches. Press some keys to hear a sound. To adjust the sound settings: Choose a Module that you want to adjust, for example the Oscillators. Press the corresponding button (OSC in this case) to call up the Page for this module. The button will light up, this shows which module is currently selected. Adjust the settings shown on the screen by turning the four DISPLAY PARAMETERS to the left hand side of the screen. These encoders are mapped to the parameters on the screen from left to right or from top to bottom. Press the button of the Module again to access further instances (Osc1/2/3 etc.) Press the PAGE buttons for advanced settings. To create an Init patch, press GLOBAL, then ENTER. To access the system settings, press GLOBAL several times. If you want to use MIDI In or Out, you may have to activate it in the GLOBAL settings.
3.3 Using the Keyboard
By default, Xsynth’s keyboard is linked to the internal synth engine. You can press the keys at any position. These have mechanics similar to space bars on QWERTY keyboards, so the Xsynth keys will not get wedged. Keys produce Velocity and polyphonic Aftertouch. To shift the Keyboard up or down, press the OCTAVE + button at the left hand side of the keyboard. Press it at the left side for -, at the right side for +. The MODULATION button is pressure sensitive. PITCH + is also pressure sensitive, but in two ways: the more you press on the left side, the lower the pitch and vice-versa for the right side.
8 – Quickstart – Xsynth Manual

If you want to use MIDI In or Out, you may have to activate it in the GLOBAL settings. Press MACRO and GLOBAL to access the MIDI CC page. Then, the four encoders to the left hand side of the display will transmit CC messages when turned.
3.4 Using the Audio interface:
Connect Xsynth to your computer through USB. Your computer will automatically recognize Xsynth as an audio interface and MIDI interface. Connect your external signal to AUX IN of Xsynth. Connect Xsynth LINE OUT to your speaker system/Mixing console/audio interface/amplifier etc. or connect your headphones to PHONES. The audio interface must be activated in GLOBAL.
3.5 How to update
Download our Editor and newest firmware from esi-audio.com. Open the Editor and go to Global>Update firmware. Select the update file and click OK. Observe the progress bar on your computer as Xsynth may not show anything on screen. Wait until the process is finished. This may take 15 minutes or more.
While the update is running: · Do not switch Xsynth off. · Do not play any notes on Xsynth and do not touch any of the controls. · Do not send any other MIDI data towards Xsynth. · Do not terminate the connection to your computer. · Do not run anything on your computer that causes a high CPU and/or RAM usage.
NOTE: Xsynth must be connected through USB for the update process.
Quickstart – Xsynth Manual – 9

4. Troubleshooting
Xsynth does not switch on. Check the USB connection. Try a different USB cable or connect it to a different port on your computer. If you use Xsynth without a computer, make sure the power supply works correctly. The Volume potentiometer also works as an I/O switch. Turn it clockwise to switch on Xsynth.
There is no sound output. Make sure Xsynth is switched on. Check your cable connections, try different cables. Cables with a plug diameter larger than 10mm may be too big to fit. Restart Xsynth and recheck. Press the MIX button and make sure that at least one oscillator is at an audible volume. Check the modulations in MOD if there are modulations that change the volume. If you are using MIDI, make sure that MIDI is activated in the GLOBAL settings. Check if Xsynth is set to the same MIDI Rx channel as the sending device. Check that the Filter Cutoff is not set to zero (or maximum when using High pass), check the corresponding modulations. Check the effects, make sure no effect has a Post level of zero. Check Global, page 3: Channel vol. This must not be zero. Update the firmware and retry.
There is sound output although there should be none. It is quite likely that a modulation is present which lifts the volume over zero. Osc1 and 2 are routed into RingM before the Mixer. If RingM is active, output will be heard even if Osc 1 and 2 vol are zero. Also, some FX can make noise on their own, especially Bit Crusher. Remember that Xsynth has an external input and an audio interface, so the output might also come from there.
10 – Troubleshooting – Xsynth Manual

I cannot access the system settings. When pressing Global, the display just says ,,Init Sound, Press ENTER”. Press GLOBAL again, then the system settings will be shown.
Xsynth does not react to MIDI. Make sure that Global>DINMIDIIn To Engine is set to Enable. Check if Global>MIDIRxCh is set to ALL or the same MIDI channel as the sending device. Check your cable connections. The MIDI Out of the sending device needs to be connected to the MIDI In of Xsynth. DIN MIDI on Xsynth uses TRS-A type connections. Use a DIN to 3.5mm jack adapter if necessary. If you are using a 3.5mm to 3.5mm jack cable, make sure the other device has the same pin configuration as Xsynth (TRS-A, Tip=signal, ring=ground).
Xsynth does not connect to my computer through USB. Do not use front USB, a USB hub or longer extension cables. Try other cables or different USB ports on your computer. If you use a computer which is so fancy that it does not have native USB support, try a different hub/bridge adapter or try another computer. Remove all other USB devices except for a mouse. Check if dust has accumulated in Xsynth’s or your computer’s USB ports. Make sure the Audio Interface is activated in the Global menu.
Xsynth is not recognized as a MIDI device by a standalone device with USB MIDI host. Some standalone sequencers or controllers with MIDI host have difficulties with Xsynth, as this is a combo device with MIDI and audio interface. Try disabling the audio interface in GLOBAL or use DIN MIDI instead.
I cannot change the sampling rate of the audio interface on my computer. Xsynth’s internal synth engine works with 96kHz sampling rate. The audio interface is coupled to this sampling rate and cannot be changed.
Troubleshooting – Xsynth Manual – 11

When connecting Xsynth to the computer and using the Editor, there is a strange error message like ,,Not enough memory available” or similar. On some OS, Xsynth cannot be connected through MIDI to the Editor and your DAW at the same time. In this case, make sure only your DAW or the Editor is open, not both.
I cannot record a signal on Aux In on my computer. Check if the AUX cable is plugged in correctly. Open the Editor and select the OSC page. Look at the MIXER section. Set Ext Source to Analog and make sure the External value is not zero. Note: Xsynth does not have a mic preamp and cannot supply phantom power. Use an external mic preamp if necessary.
Xsynth has crashed and does not react to any inputs anymore. First, restart your device. Make sure Xsynth is using the most current firmware. Check back with our web site for the current version. This may be caused by sending too much data through MIDI to Xsynth. Avoid sending MIDI data to Xsynth which was meant for a different device. If possible, avoid sending unneccesary CC or Sysex messages. If you can reproduce a crash, please contact our support team with a detailed description.
There is an issue with Xsynth while the device is connected to other hardware. Disconnect everything but a power supply and a pair of headphones. If the issue is gone, it may possibly be caused by one of the other devices and not Xsynth itself. Connect the other devices one by one and re-check inbetween if the issue is back. This might help identifying the source.
The updating process has failed. Check your USB connection. Restart the Editor once and reboot Xsynth two times. Then try updating again. If your computer recognizes Xsynth as a device named ,,RWAHK” or similar, press Refresh in the Editor and retry performing the update. Repeat this process up to 5 times if needed. If it still does not work then, please contact our support.
12 – Troubleshooting – Xsynth Manual

There is a setting I would like to adjust, but I cannot find it on Xsynth! Many additional settings can be accessed through the Editor. Sound-related requests might be solved through the Mod Matrix.
The Aftertouch or Modulation button do not seem to do anything. These controls have to be used in the Mod Matrix to a destination before they have any effect. Note that the MODULATION button (=Mod wheel) is pressure sensitive.
The LFOs do not seem to have any effect. Check the Rate value, this has high resolution in the ultra low range. Value 0=no effect, 1=1rev per 55sec, 40=1Hz approx.
On some Mod Slots, the destination list seems to miss some items.
Check if there is another Mod Slot with To Node [number of the Slot with missing entries] as a destination. You cannot daisy-chain or
cascade the Node modulations.
I have connected Xsynth to a different device, but Aftertouch messages do not seem to be transmitted. Xsynth produces Polyphonic Aftertouch, not all devices are compatible to this. If necessary, use the Editor>GLOBAL>AT type>Channel setting. Then, Xsynth sends Channel Aftertouch messages which can be received by most devices.
Xsynth wildly plays a lot of notes which cannot be stopped! Deactivate ARP and HOLD by pressing the buttons at the left hand side of the keyboard. If you are connected to a computer or other MIDI device, make sure you have not created a MIDI feedback loop.
How can I change the internal tempo of Xsynth from 120 to something else? Use Arpeggiator>Tempo.
Troubleshooting – Xsynth Manual – 13

How do I connect a Sustain Pedal to Xsynth? Connect an external MIDI device to Xsynth which has a pedal jack and connect your pedal there. Send the MIDI output of this device to Xsynth. You may also use the HOLD button on Xsynth instead. Due to its compact size, Xsynth itself does not feature a pedal jack. Xsynth sends a Sysex message when idle. This is a ,,Keepalive” signal and can be ignored. It lets the Editor know that Xsynth is still connected.
14 – Troubleshooting – Xsynth Manual

Technical Specifications
Xsynth Compact synthesizer with integrated keyboard, MIDI interface and audio interface Solid aluminum chassis
Synthesizer Architecture: Virtual analog subtractive synthesis, based on Sample ROM Polyphony: up to 10 voices 3 Oscillators 3 LFOs 3 AHDSR Envelopes (Attack, Hold, Decay, Sustain, Release) Mod Matrix slots: 16 Patch memory: 512 sounds (4 banks with 128 patches each) 3 effect sections, EQ
Keyboard 25 velocity-senitive keys with full width and compact length, derived from Xkey series Polyphonic Aftertouch Arpeggiator, Glide, Octave Shift, Hold functions Pressure-sensitive Modulation and Pitchbend buttons
Connections USB-C: for power, audio and MIDI DIN MIDI Input and Output on 3.5mm TRS jack each (TRS-A) Headphones, Line Out, Aux In on 3.5mm TRS jack each (2ch per plug, unbalanced)

Technical Specifications – Xsynth Manual – 15

Audio interface 96kHz/24bit Recording of synth engine output directly to computer Playback from computer is routed to Phones and Line Out Recording of external signals through Aux In
MIDI interface Connects Computer with Xsynth itself through USB MIDI DIN MIDI In and Out can be bridged to USB
Free Editor app for Mac and Windows
Power Bus-powered over USB-C Power consumption: <400mA at 5V / <2W
Dimensions 382mm (width) x 135mm (depth) x 27mm (height, including encoders, caps and rubber feet) Weight: 634g Package dimensions: 430mm (width) x 171mm (depth) x 34mm (height) Package weight: 1kg approx.
16 – Technical Specifications – Xsynth Manual

5. General Overview

1 Keyboard control buttons

2 I/O and Volume potentiometer

4 Display Parameters encoders 5 Display

7 Connectors

8 System buttons

10 Keyboard

3 Module buttons 6 Page buttons 9 Patch Select encoder

General Overview – Xsynth Manual – 17

6. Synth engine schematic diagram
18 – Synth engine schematic diagram – Xsynth Manual

Operation Instructions
6.1 How to understand this manual
NOTE: Important information about technical details and useful tips. You may run into difficulties if you do not read these hints carefully. Even if you only flicker through this manual, you should definetly take a look at these hints.
WARNING: Not following this advice can result in one or more of the following: damage, injury, loss of data, voiding warranty, sad cats and very angry support staff.
Controls, buttons and connections on Xsynth hardware and Editor are written in bold and with a capital letter, for example the Osc button or the Volume potentiometer.
Control substructures and menu layers are explained with >, for example: Osc1>PWM. Keep in mind that some settings on Xsynth can only be accessed through pressing the corresponding button several times, or by using the Page buttons.
Some entries refer to different chapters with a single arrow, see corresponding section. This has been done to avoid having to write the same paragraph multiple times.
Entries in Table of contents as well as hyperlinks can be clicked and will lead you to the designated chapter of this manual or to a website.
· Bullet points indicate a list of either instructions, menu entries or technical details.
Most values on Xsynth range from 0…127. This is based on the MIDI protocol, which provides a 7-bit range for these numbers. While humans would count from 1…128, computers start counting at zero.
Operation Instructions – Xsynth Manual – 19

If you are new to synthesizers, you will find lots of explanations for the very basics in this manual. It might be a bit overwhelming at first because there is a lot of knowledge to take in before you will understand Xsynth. Therefore, we recommend to read this manual in small portions.
NOTE: Load this manual on your mobile device, carry it with you and read a few pages every time you have a few minutes. No matter where and when you take a short break in the office, on a journey, at the fireplace, or even in the bathroom (but not under the shower): regularly read one chapter of this manual at a time. This will help you memorize all the info better than by reading it in one go.
6.2 Getting started
Open the box and take Xsynth out. Keep the box for later use. Unwrap Xsynth from the bag. A USB-C cable is included in the small oblong paper package if needed. There is a protection foil on the display, removal is optional.
Xsynth comes with free software so you can get started with audio production right away. There are postcard-sized vouchers included in the box. Please follow the instructions on these vouchers in order to get your free software.
Place Xsynth on a flat, even surface where it has a safe stand. Xsynth should not move when the keys are being played.
NOTE: Many normal keyboard stands that are shaped like an X cannot support Xsynth, as Xsynth is not wide enough to bridge the gap between the upper two metal rods. Put a large solid board across these two rods where Xsynth can rest safely on, or use a table or laptop stand instead.
For example, the rear galley of an Airbus A350 provides a fantastic place to put your Xsynth on. The crew might even start a spontaneous jam session with you.
WARNING: If Xsynth is in an unstable position, damage and/or injury may occur. Plus, spectators may experience schadenfreude.
20 – Operation Instructions – Xsynth Manual

WARNING: Keep Xsynth away from any liquids, food, dirt and any other substances which may get into the case and/or under keys. Do not let any kind of liquid get into any part of the device! Also, keep Xsynth away from excessive amounts of dust and sunlight. Do not operate Xsynth in moist, extremely hot or cold environments. Do not slam Xsynth into faces of people who do not like your music. WARNING: This device can create sounds which can damage your ears when listened to at high volume levels. Only turn up the volume as much as you need to hear the sounds clearly. If necessary, you may clean Xsynth with a soft, lint-free dry cloth. Do not apply pressure to the plastic parts while cleaning. Do not use a microfiber cloth, as these can scratch the plastic surfaces. Do not use any cleaning liquids or alcohol, as they may damage the surface and make the plastics brittle. When Xsynth is not in use for longer amounts of time, cover the instrument with a piece of cloth or put it into its original packaging.
Operation Instructions – Xsynth Manual – 21

7. Connections
Connect your cables before you switch on Xsynth. You will definetly need:
· power through USB, from a computer, a separate power supply or a power bank · headphones connected to Phones or a mixer/interface/amplifier connected to a loudspeaker setup. Other connections are optional.
7.1 Connection types and signal directions
22 – Connections – Xsynth Manual

Line out Mixer/Audio Interface input External line level audio signal Aux In Phones Headphones (preferrably 32 Ohm) Xsynth MIDI Out External synthesizer/keyboard MIDI In External synthesizer/keyboard MIDI Out Xsynth MIDI In USB transmits power, MIDI and audio.
Cable types USB: USB-C All others: 3.5mm TRS DIN MIDI pin layout: TRS-A
PHONES, LINE OUT and AUX IN feature two channels on one stereo plug. These audio connections are unbalanced. If needed, use a Y-cable with one 3.5mm / 1/8″ TRS plug on one side and two 6.3mm / 1/4″ TS OR two RCA plugs on the other side.
WARNING: Only connect Line level signals to Aux In. Do not connect any modular synthesizer output to the Aux In, as this will damage Xsynth’s circuitory.
Connect the MIDI ports of Xsynth only to other device’s MIDI ports, otherwise damage and/or injury may occur. Never connect outputs with outputs. Also, reading too many warning labels can result in listlessness.
NOTE: We recommend using headphones with 32 Ohms or less. You may use higher rated headphones, but these might not produce enough output volume when used on Xsynth.
Connections – Xsynth Manual – 23

7.2 USB connection
Make sure you connect Xsynth directly with your computer. Do not use front USB, or a USB hub inbetween. If you are using Xsynth with a USB PSU, ensure that this PSU is connected to the same wall output as the device(s) Xsynth is connected to. Xsynth will appear as a combo device, featuring MIDI and audio. Some other standalone synthesizers/grooveboxes/sequencers etc. with USB MIDI Host may not be able to detect one or more of these modes. In this case, you can deactivate the audio interface in GLOBAL, then your other device can use the MIDI input of Xsynth.
Your computer may detect Xsynth as two devices: one audio interface/sound card and a MIDI device/multimedia controller. Your DAW program should recognize both of them easily.
8. General controls, display
Switch Xsynth on by turning the I/O knob clockwise. This also regulates the output volume on Line Out and Phones.
Call up a Module by pressing the corresponding button. The display now shows the corresponding Page. Access several further Pages by pressing the same button several times. Some modules have additional pages which can be accessed by pressing Page . Press the button again to scroll through several pages (if available).
The button of the currently selected Module is lit in order to show that it is active. Press one or more keys to hear a note. The display now shows the Wave Display, an oscilloscope view of the current output signal. When you release the keys and the note volume diminishes, the oscilloscope view goes away after a few seconds.
NOTE: You can adjust the oscilloscope view display time or switch it off entirely in Global>WavDisplay and Global>DispTime.
24 – General controls, display – Xsynth Manual

9. Keyboard and controls
Xsynth features a compact keyboard with 25 keys, derived from our Xkey series. Key width on Xsynth is the same as on Xkey, just the height has been shortened.
9.1 Velocity, Polyphonic Aftertouch
The keys produce Velocity and Polyphonic Aftertouch. This means that every key has its own sensor for both values. Velocity measures how fast every key is pressed. At every beginning of a keystroke, this value is measured and passed on to the
single corresponding voice in the Mod Matrix. This value increases the faster the key is pressed down. Polyphonic Aftertouch measures the additional force applied to the key after the keystroke, while the key is held and pushed further. The more pressure, the more the value increases. Also, this value is measured for every key and sent to every single note individually.
NOTE: Polyphonic Aftertouch and Velocity will not do anything unless they are assigned in the Mod Matrix. Our tip: Use Source: Poly After. Filter Cutoff or Resonance.
You can switch the Aftertouch to Monophonic/Channel Aftertouch in Editor>Global>Touch>AT type>Channel.
Then, the whole keyboard aftertouch sensors will be switched together and act as one Aftertouch sensor. Every note will receive the same Aftertouch value in this case.
WARNING: Xsynth’s keys have been constructed to withstand heavy use, but only to a certain extent. Slamming the keys overly hard will destroy your warranty, your device, and your fingers (in that order).
Keyboard and controls – Xsynth Manual – 25

9.2 Keyboard control buttons
ARP: Arpeggiator settings. Calling up the ARP page for the first time after the device has started will activate the Arpeggiator. Pressing the ARP button again will switch the Arpeggiator off. Top line of the Display will state if the Arpeggiator is ON or OFF. Please read the next chapter for further information see Arpeggiator chapter
GLIDE: Sets Portamento transitions between played notes. Press the GLIDE button to call up the Page, then set Mode to Trig or Legato and Rate>0 to activate GLIDE. Increase Rate for longer transition times. Glide also works on polyphonic sounds, as it blends the individual notes of a chord to each note of the next chord.
– OCTAVE +: Pressing this button at the left half will shift the entire keyboard down one octave. Pressing the right half shifts the keyboard up. This change will affect all oscillators alike and remains active when you load a new Patch.
You can press the button several times in a row. To go back to normal pitch, adjust with and + until the Display says Octave: 0.
HOLD: Works like a Sustain pedal. When HOLD is active, all notes will continue until the Hold button is released (Momentary) or pushed again (Latched). The HOLD button LED is lit for as long it is active. Additionally played notes will also continue. If you exceed Xsynth’s polyphony by playing more notes, the new notes will replace the old notes. Hold mode can be switched between Latched and Momentary in GLOBAL, page 2.
MODULATION: This is a pressure sensitive button that resembles the Modwheel on other devices and generates Modulation messages through MIDI (CC1).
The harder you press, the higher the output value. Lowering pressure the button sends smaller values and when the button is fully released, value 0 is sent as the last message.
– PITCH +: Resembles Pitch bend on other keyboards. This button has two halves which are pressure sensitive each. Pressing on the left half bends the pitch downwards, and upwards on the right half.
The more pressure you apply, the larger the pitch bend. Releasing the button returns it to the normal (zero) position.
NOTE: Pitch Bend range in semitones can be adjusted in Editor>OSC>PITCH>Bend Range or on Xsynth Osc>Osc Global>Bend.
26 – Keyboard and controls – Xsynth Manual

9.3 MIDI PANIC
Press OSC and LFO and hold them for two seconds. This will send a message on MIDI CC 123 (All notes off) and a Note Off message for every note of the current channel. After you release all keys and wait until the Envelopes and FX have faded out, all notes on Xsynth will fade out under normal circumstances. Same goes for an external MIDI device controlled by Xsynth. If a note on Xsynth keeps playing although HOLD is not active and no MIDI input is present, you may use the MIDI PANIC function.
10. Arpeggiator
When notes are played on Xsynth’s keyboard, the Arpeggiator uses these as an input and creates a pattern of notes based on your input. Pressing the ARP button calls up the Arpeggiator Page and switches the Arpeggiator on and off. Current state is shown on the top line of the display on the Arpeggiator Page. When Arpeggiator is on, the ARP button LED blinks at the rate of Tempo.
Type: Chooses the basic direction/mode for the Arp. Up and Down and combinations of these are available, as well as Random and Played. In these modes, a monophonic melody line is created when at least one note is played. Notes will jump back and forth between and around the input notes. Direction is determined by the selected type. Except for Played, this mode keeps the order of the notes as they were played. Chord creates a rhythmic pattern by chopping the chord into shorter notes. These notes remain on the same pitch as the notes entered on the keyboard.
Tempo: How fast the Arpeggiator is running in beats per minute. This setting sets the internal clock of Xsynth. If Sync is On, the Tempo will be taken over from external MIDI clock signal and the Tempo setting cannot be changed manually.
Octave: How many octaves above or below the Arpeggiator extends around the base notes.
NOTE: Notes created by the Arpeggiator are sent out through MIDI. More controls are available in the Editor>Aux>Arpeggiator.
Arpeggiator – Xsynth Manual – 27

11. Display Parameters
The four encoders to the left hand side of the Display are controlling the up to four on-screen parameters, either from left to right horizontally or from up to down vertically. For example:
· Press Osc. · Then, Osc Wave can be controlled by the leftmost encoder, Coarse tune by the second etc. · Now press Mod two times. · The leftmost encoder scrolls through Source, second encoder selects Destination and third encoder the Amount. As there is no
fourth value on this screen, the rightmost encoder does not control anything.
NOTE: All encoders on Xsynth have acceleration detection. This means that the faster you turn an encoder, the bigger the value changes per turn. If you cannot select a value precisely enough, try turning the encoder slower.
CC Send
By popular demand, we inplemented a Page which turns the four Display Parameters encoders into MIDI CC transmitters. Press MACRO and GLOBAL simultaneously. Now the display shows a set of CC numbers. These are mapped to the four Display Parameters encoders accordingly. The lowest row of this Page shows the current CC value. When one of the encoders is turned and the value is changed, a MIDI CC message with the new value will be sent. When reaching 127 and turning further, the value will NOT jump back to 1. There are four Pages available with a different set of CCs each.
Use the MIDI Learn feature of your DAW to map these CCs to a value in your computer. Consult the documentation of your DAW on how to map a MIDI controller or on how to use MIDI Learn.
28 – CC Send – Xsynth Manual

11.1 List of default CC numbers

DP Encoder Page 1 Page 2 Page 3 Page 4

The CC numbers may seem odd, but they have been chosen so that the CC messages generated from this feature will not interfere with Xsynth’s other settings.
NOTE: You can change the assigned CCs in Editor>Global>MIDI CC at your own risk.
CCs above 119 are not available for safety reasons as they can suddenly mute outputs of Xsynth or other MIDI devices. In some cases, these messages can even render other devices mute or permanently unusable, hence these CC numbers cannot be sent by this feature.

CC Send – Xsynth Manual – 29

12. Oscillators
12.1 Introduction
Oscillators are the heart of Xsynth. For this reason, we have put some extra love into this section.
An Oscillator produces an alternating signal in the audible range at a desired pitch. Xsynth has three Oscillators, each of them can be set independently and be active at the same time.
For every note being played, a set of these three oscillators is present and produces a basic audio signal at the pitch corresponding to the note. Then, these signals are handed to the next stages of Xsynth’s signal processing.
Xsynth is based on a Sample ROM. The Waveforms of the Oscillators are stored as wave files on Xsynth. The files have been polished, furnished with loop points and grouped together as sample sets. One sample set is visible as one Osc Wave. The timbre of the sounds differ a lot across the keyrange. Try them out!
We included basic waveforms, ready-to-use sounds from many categories, field recordings and drumkits. Drumkits have many different one-shot sounds within one sample pack, so make sure to press several keys when trying them out. Most samples are looped and will play as long as a note is held. Some are one-shot, especially the drum sounds.
NOTE: Open the Editor and click on OSC>Osc Wave selection. There, you can see the groups in which the Waves have been organized.
12.2 Walkthrough
Create an Init Patch by pressing Global, then Enter. Press Osc and if the display does not show Osc 1, then press the Osc button again until it does. Play one note on the keyboard. You will hear the first Osc Wave on its own. Release the key, turn the leftmost of the Display Parameters encoder slightly clockwise until the next Osc Wave is selected. Press the key, listen to the sound, release the key, go to the next Osc Wave etc., etc. Many Osc Waves sound different in the Attack phase than the others. We recommend to release the key and press it again for each new Osc Wave you listen to.
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12.3 Common features
Each of the Osc has the following features: · Wave selection · Tuning in Coarse (semitones) and Fine (Cent) steps · Keytrack On/OFF when OFF, this will tell the Osc to play at only one pitch, regardless of which key is pressed. Use Mod, OSC1/2/3 Pitch destinations for tuning if needed.
12.4 Osc Global features
Accessed through Osc, Page . · FM: Frequency Modulation amount. Osc3 modulates the pitch of Osc1 at audio rate. · PWM: Pulse Wave Modulation. Available on Osc1 only. This narrows the width of square waves and many others, but does not work for all Osc waves. Standard value is 64, which has no effect. · O2sync/O3sync: Hard Sync between Osc1+2 and Osc 1+3 · Poly: Changes between polyphonic and monophonic mode for the current Patch · Unison: Stacks several voices on top of each other. Count determines how many voices are stacked onto a single key, and Detune spreads the tuning of each voice.
NOTE: Using Unison reduces the polyphony! Unison Count of 4 leaves you with 2 voices, and 1 voice for Count levels over 4. Count and Detune settings are only visible when Unison is ON.
· Drift: Available on Osc3 only. On each keystroke, the tuning of this Osc is chosen randomly. The note stays constant in pitch while being played.
· Bend: Controls Pitchbend range in semitones
Oscillators – Xsynth Manual – 31

13. Envelopes
13.1 Overview
Envelopes are control signal generators which start every time a key is pressed. First and foremost, Envelopes are used to control volume over time, but they can be also used to control other parameters. Xsynth has three envelopes, each of them has five stages: Attack, Hold, Decay, Sustain, Release. NOTE: Env2 and Env3 can be selected by pressing the Env button several times. Release can be accessed by pressing Page . Env1 is connected to Amp Volume, Env2 is connected to Filter Cutoff.
13.2 Function
When you press a key, the Envelope starts running from 0 to its full amount (127). The Attack value describes how long this will take. If Attack is 0, the Envelope value output will immediately jump to 127 when the key is pressed. Hold describes how long the maximum value is continued. When the Hold time has run out, the Envelope output value will diminish again until it reaches the Sustain level. Sustain is the level that remains constant as long as the key is being held. The transition time between the full level and the Sustain level is called Decay.
32 – Envelopes – Xsynth Manual

As soon as the key is released, the Envelope output value goes to zero again. Transition time between Sustain level and zero is called Release. Then, the Envelope is reset and starts again on the next keystroke.
Envelopes – Xsynth Manual – 33

To sum it up: · Attack: Fade in time from 0…127 · Hold: How long 127 is held · Decay: Fade time from 127 to Sustain level · Sustain: Level that is kept constant as long as key is held · Release: Fade out time from Sustain level to 0
Confused? Let us take a look at some examples.
13.3 Walkthrough
· Create an Init patch (Global, Enter). Press Env. You will now see Env1, which is linked to Amp Volume by default. · Now all Envelope values are set to 0, only Sustain is at 127. · Press a key on the keyboard and release it after a few seconds. You will hear a simple sound which transitions to full volume
immediately after you have pressed the key, and it goes silent immediately when you release the key. Also, there is no volume variation while the note is held.
This happens because: Attack=0: Volume goes from zero to full value immediately Sustain=127: Volume remains at full value as long as the key is held Release=0: Volume goes from Sustain level to 0 immediately (Hold and Decay play no role here since Sustain is at full, therefore there is no transition between the end of Attack and the Sustain level.)
· Now set all controls of Env1 to a value about 70. Again, press a key on the keyboard and release it after a few seconds. · You will hear the same sound, but this time, the volume swells up, then diminishes a bit and fades out smoothly when you
release the key.
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This happens because: Attack=70: Volume goes from zero to full value slowly Hold=70: Volume remains at full for a while Decay=70: Volume fades to Sustain level smoothly Sustain=70 Volume remains at medium value as long as the key is held Release=70: Volume fades out smoothly
· Experiment with these values and try different combinations! NOTE: Env3 is not connected to anything by default, you have to make the connection yourself in the Mod Matrix. You can also link Env1 and Env2 to something else there. The individual Envelope stage values are available as destinations in the Mod Matrix. You can also modulate the envelopes with themselves in order to create warped gradients. If you want to decouple Env1 from Volume, go to the Mod Matrix and add a modulation with Constant Amplitude -100%.
Envelopes – Xsynth Manual – 35

14. LFOs
While the Envelopes are one-shot control signal generators, LFOs produce cyclic control signals.
LFO stands for Low Frequency Oscillator. Xsynth features three LFOs which range from approx. 0.018Hz (55sec/period)…90Hz. That’s
why these are called low frequency, which also sets them apart from the Oscillators in the Osc section who can produce frequencies well over 20.000Hz. NOTE: The LFOs themselves are not audible. They must be used as Sources in the Mod Matrix to have any effect. Every note that is being played gets its own set of these three LFOs, which start at zero when each note begins. You can synchronize these LFOs with LFO Global On/Off. Each LFO has the following parameters:
· Wave: Sets the shape of the LFO. Noise can be used as a random generator. · Global On/Off: Switches between individual LFO per note or one for all notes · TempoSync: Synchronizes this LFO to incoming MIDI clock. When active, Rate switches to fractions of beats. 1/1 means one
LFO cycle per one beat etc. · Rate: Cycle speed of this LFO. 0=no effect, 1=1cycle/55sec, 40=1Hz, 127=90Hz (Values approx.) · Delay: Starts the LFO a certain amount of time after the keystroke · StartPhase: Starts the LFO from a later point of the wave
36 – LFOs – Xsynth Manual

15. Macro
Offers shortcut access to some parameters of Xsynth. Pick your favorite controls and arrange them onto to one set of the four Display Parameters encoders as you like. You can map up to 3 parameters onto one Macro control.
Pressing MACRO once. Xsynth will now display M1…4 parameters. Turn the encoders to change values. Press MACRO again to get to the Macro Edit M1 page (1/12). Here, you can edit:
· Param1: Destination for M1. A selection of control destinations across Xsynth are available, part of the list of the Mod Destinations.
· Min: / Max: Sets the borders of the control range. This limits the Macro control range to a definable area. Default: 0…127. · Type: Spread: Macro control changes original value proportionally to the original value. Absolute: Macro control changes
destination value immediately.
Press Macro 3x to get to M2 Param 1 (Page Macro Edit M2 4/12). Make sure you do not set M2 Parameter 1 to M1 Parameter 2, unless you want both of these parameters mapped to the same
encoder.
NOTE: Macro settings are stored globally, not per patch. If the settings do not persist after reboot, use the Editor>Macro>Save to Xsynth command.
NOTE: Press MACRO and GLOBAL to access CC Send.
Macro – Xsynth Manual – 37

16. Filter
16.1 Introduction
Xsynth is based on subtractive synthesis. This means that the basic sound is created by oscillators, then a filter is applied and subtracts part of the signals until the desired timbre is achieved. Think of a block of marble: By chiseling away part of the stone, a wonderful sculpture is crafted. The oscillators provide the stone, the filter is your chisel and hammer. First, let us take a look at the most commonly used filter type, and how it works.
This is a so-called low pass filter. It removes the high-pitched frequencies from a signal (right hand side) and keeps only the frequencies around the cutoff frequencies, and below (left hand side, area under the curve).
38 – Filter – Xsynth Manual

Ever seen the visualization with the moving, jumping bars on a stereo system? This depicts the volume of frequencies across the audio range. Low frequencies are on the left and high frequencies on the right hand side, like in the diagram above. With a low pass filter, you can reduce the height of the frequencies/jumping bars to the right hand side of the Cutoff value. This smoothens the signal. On an oscilloscope or the Wave Display on Xsynth, you can see corners of various signals getting rounded off. This effect increases the more you turn the Cutoff downwards. If this reminds you of an equalizer, you are correct! Each band of the EQ acts as a single filter. However, these usually cannot change the sound as much as the filter on a synthesizer.
Filter – Xsynth Manual – 39

Let us take a closer look at each of the sections of the filter curve.

· Passband (green): Frequencies which pass through the filter unchanged
· Cutoff (dotted line): Boundary value for filter
· Resonance (yellow): Area around the cutoff. Lets original signal pass with definable augmentations
· Transition band (orange): Slope zone where less and less frequencies get through
· Stopband (red): Frequencies removed entirely by filter
Please read until the end of this chapter for further information.

Filters do not just cut away some of the frequencies and leave you with the rest. In fact, filters also add something to the signal. In the area around the Cutoff value and the transition band, slight distortions and colorations appear, adding to the character of the overall sound of a synthesizer.
If the Filter was perfect with no distortions and no impurities, the resulting would sound sterile and lifeless. Also, an ideal filter with no distortions would be mathematically impossible.
40 – Filter – Xsynth Manual

16.2 Cutoff
The central value for the filter. It determines the point at which the filter starts cutting away and coloring the sound. Cutoff has double bit resolution, that’s why the maximum value is 16383 instead of 127. This allows for tuning the filter precisely to certain frequencies or even notes.
On Low pass filters, the default Cutoff value is at full (16383). Turn it down to cut more frequencies away and to smoothen the sound. Default for High pass is 0. Turn it up to cut more frequencies away. Band pass does not have a default value as it always cuts away frequencies.

16.3 Resonance
This parameter controls the amount of frequency augmentation which is applied around the cutoff frequency. Turning this up results in nasal, whistling or zappy sounds.

16.4 12dB or 24dB slope?
A filter in a synthesizer does not block all frequencies which are exactly above the filter Cutoff frequency threshold. Instead, the transition is a bit smoother.
A 24dB Low pass filter means: For all frequencies above the cutoff frequency, the volume diminishes by 24 dB per octave that goes above the cutoff frequency. This leaves a smooth transition area. The more dB on the filter, the steeper the cutoff line. Test which mode works better on your sound.

Filter – Xsynth Manual – 41

For example: Imagine the cutoff frequency on a 24dB Low pass is set to note A at 440Hz. · One octave up means that the frequency is doubled, therefore the A one octave above is at 880Hz. · Per octave up, loudness is dampened by 24dB. · After the filter, the frequencies around 880Hz will be 24dB less in volume than the frequencies around 440Hz. · Another octave above, at around 1760Hz(=880×2), the volume will be 48dB less (24×2) etc. until the upper frequencies become inaudible.
Remember the simile with the marble? 12dB would be the wider chisel, which offers softer edges, but less precision. 24dB would be the narrower chisel, allowing for more precision and sharper edges.
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16.5 Modes
Xsynth provides a multimode filter with the following options (can be accessed with Page ):
· Off (no filter) · 12dB Low pass · 12dB Band pass · 12dB High pass · 24dB Low pass · 24dB High pass · 24dB Band pass
Low pass: The frequencies below a certain frequency pass through the filter. Most commonly used in synthesis. This filter rounds off the sharp edges, resulting in a smooth sound. The lower the CutOff, the more sharp edges disappear. On Low pass, start with the CutOff value at full and turn it down to subtract more frequencies.
High pass: The frequencies above a certain frequency pass through the filter. Removes the bass and leaves you with a sparkling, hissing sound. On High pass, start with the CutOff value at zero and turn it up to subtract more frequencies.
Band pass: A combination of Low Pass and High pass, leaving only middle frequencies. Creates thin, hollow sounds. Can be interesting for pads and FX sounds. On Band pass, start with the CutOff value in the middle and move it around. There will always be frequencies filtered out in this mode.

Filter – Xsynth Manual – 43

NOTE: Band pass 12dB lets much more frequencies pass through than Band pass 24dB. If you are creating a sound based on Band pass, make sure to try out both versions!
16.6 Drive/PreFilter
Volume control for all signals entering the filter. As Xsynth’s filter can be rather aggressive, it may come in handy to reduce the signal going into the filter.
16.7 Keytrack (KTrck)
The higher notes you play on the keyboard, the higher this value gets. Filter KTrck adjusts the Cutoff value proportionally according to the pitch of the note. On Value 105, the Filter is chromatically tuned. Zero point is note C2. Below, the Keytrack value becomes negative. Key Track can also be used as a Source in the Mod Matrix.
16.8 EnvAmt/E.Amt
Envelope 2 Filter Cutoff Amount. Controls how much of Env2 is added to the Cutoff value.
16.9 Walkthrough
· Create an Init Patch (GLOBAL, ENTER). · Press OSC. Turn the leftmost of the Display Parameters encoders clockwise until White Noise (Wnois) is selected as an Osc
Wave. · Press a key and hold it for a few seconds. What you will hear now is unaltered White Noise. This consists of all frequencies
across the entire audible range.
44 – Filter – Xsynth Manual

Remember the old days of analog TV when the antenna was unplugged or when there was no signal reception? Then, the TV screen showed a greyscale image with lots and lots of dots dancing around. If you looked closer though, some of these dots were in color. And if you looked even closer, you would have seen that every dot would have been in every color, but changing so fast to other colors that one could barely keep track. However, when you step away from the screen, all of the basic colors of analog TV light (red, green, blue) are mixed together, the result is grey, black and white.
White Noise audio is basically the same. As there are so many frequencies present at the same time, it is impossible to hear out individual frequencies. Now, we are going to use the filter to pick just some of these frequencies out and focus on these, while the rest is discarded.
· Press FILT. · Press and hold one of the keys on the keyboard. You may also use the HOLD function instead. · Now move the rightmost of the Display Parameters encoders down and up. This moves the Cutoff value. Listen how the sound changes according to your Cutoff value input. Play a bit around with this parameter, while playing some notes, so you will get a feeling for what it does. This is the result of the 24dB Low pass filter, which is selected by default. · Set the Resonance parameter to about 64. Again, play a note and keep it pressed. You will notice a distinct whistling introduced to the sound. This is the augmentation of frequencies around the cutoff. · Let Resonance remain at value 64. Move the Cutoff up and down. Notice how the whistling moves up and down with your value movements. You could in fact play melodies with the whistling while you just keep the same note pressed all the time. · Change the Resonance parameter to something else, move Cutoff up and down and repeat. · Experiment with different combinations of these values. You will be surprised what you can get out of just some plain white
noise. After playing for a while, try out the other filter models.
· Press Page and turn the leftmost Display Parameters encoder. Switch to any other type you want, for example 12dB Band pass.
· Go back to the default Filter page by pressing Page . · Experiment with Cutoff and Resonance values etc. Repeat with all other filter types.
Filter – Xsynth Manual – 45

NOTE: Cutoff values of zero for Low pass and maximum for High pass will result in no output, as all frequencies will be blocked then. NOTE: Please do not attempt to examine the grainy greyscale image on a modern TV. They will possibly just show a plain single-color frame when no signal is received.
46 – Filter – Xsynth Manual

17. Mixer
All signals from the Oscillators are merged in this section. Volume of Osc1/2/3 can be regulated here. RingM: Ring Modulator. Grabs signals of Osc1 and Osc2 and multiplies them with each other. NOTE: RingM gets its signal from the oscillators before the Mixer section. If Mixer>Osc1 and Osc2 are set to to zero but RingM is active, you will hear an output! ExtIn (available through Page ) regulates volume of an external signal connected to Aux In. The output of the Mixer section is forwarded to the Filter. NOTE: Turning up the volume of the Oscillators too much may result in internal clipping. Listen closely and check the output signal with the Wave Display constantly. When the waves plateau at the upper and/or lower end although the Osc Waves do not look like this by default, clipping is present.
Mixer – Xsynth Manual – 47

18. Effects/Aux
Xsynth is furnished with three effect sections and an equalizer. Press FX to access the settings. The Display will now show FX1, 2 and 3 from left to right with their corresponding Post level values. These control the volume after the FX module has been passed.
NOTE: Do not set the Post level value to zero, otherwise you will mute the output of Xsynth entirely!! If you want to bypass an effect, set Type to Off.
Press Page to access further options. Each effect type has its own parameters available.
18.1 FX1 Insert effects
None: no effect/bypass EQ bandpass: Changes volume of mid-range frequencies. MidFreq: Center Frequency, MidGain: Volume shifting up/down Distortion: Intentional destruction of audio.
Type: Overdrive warm sound, only slight distortions Distortion skittish destruction of sound Fuzz violently transforming the signal into noise
Depth: intensity of distortion, PreGain: Volume increase before signal enters destruction stage, PostGain: Volume increase after distortion, HighCutoff: Removes overtones Compressor: Reducing volume fluctuation. Threshold: Volume level at which the compressor starts acting. Attack: Time before compressor reacts. Release: Time for how long the compressor keeps working after signal drops below Threshold. Ratio: Narrowing rate for everything that goes above the Threshold. WahWah: Filter which goes quickly upwards, then downwards one time for each keystroke. Filter type: Low Pass / Band Pass, Frequency, Resonance see detailed explanation in the Filter section. Attack: Time how long the filter takes to rise to its maximum point, Decay: Time how fast filter descends after reaching maximum point, Threshold: Volume level which must be reached before the filter is activated
48 – Effects/Aux – Xsynth Manual

LoFi: Reduces the signal into a lower bitrate and sample rate, which introduces artifacts and distortion. BitDepth: Staggers/rasterizes the signal vertically. SampleRate: Staggers/rasterizes the signal horizontally.
18.2 FX2 Reverb
Selection of different reverb types: Hall1/2, Room 1/2/3, Stage 1/2, Plate None: no effect/bypass Time: Hall length PreDelay: Time difference between original signal and reverb
18.3 FX3 Chorus/Flanger/Delay
Chorus effects make the sound fuller by copying the sound and playing it along with slight delays. Flanger effects cause a wobbling sound. Delays create copies of the sound and play it along the original sound with larger time dilations, which creates multiple echoes. Xsynth contains several different types and combinations each: Chorus 1/2/3/4, Chorus feedback, Chorus Flanger 1/2/3, Short delay, Short delay+ feedback, Delay Echo, Cross Delay, Delay Left Center Right, Delay Left Right
Chorus parameters: Speed: Chorus cycle length, Feedback: how much of the output is routed back to the input, Depth: Chorus intensity
Delay parameters: Time L: Delay time for left stereo channel, Feedback: how much of the output is routed back to the input, Time R: Delay time for left stereo channel
PatchVol
This parameter is located at the end of the signal chain and is used to trim the overall volume of Sound Patches, in order to minimize loudness differences between Patches.
Effects/Aux – Xsynth Manual – 49

19. Modulation Matrix
NOTE: Pressing the MOD button for the first time after startup will take you to the Macro page see Macro section. Press the MOD button once more to get to the Modulation Matrix settings.
Many of Xsynth’s values can be modulated. These connections are managed here. The Mod Matrix has 16 slots. Each one is organized as following:
· Source · Destination · Amount
Source selects the signal which is used as the modulator and Destination selects the signal which should be modulated. Amount determines how strong the modulation is in % and whether it should be added or subtracted from the target signal.
In other words: The Source value is added to the Destination value. Amount scales the addition or, when set to a negative amount, inverts the addition to a subtraction.
Sources and Destinations can be used multiple times in different slots until the Mod Matrix is full.
19.1 Sources
0 None: Disables this modulation slot 1…3: Envelope 1/2/3 see Envelopes section 4…6: Release phase of Envelope 1/2/3 7…18: LFOs see LFO section.
Unipolar: only positive values of LFO Fine: Reduces the overall amplitude of LFO. Great for subtle pitch modulations Unipolar Fine: combination of the two above
50 – Modulation Matrix – Xsynth Manual

19…20: Velocity. The keyboard measures how fast each key is being pushed down. The faster, the more this value increases. Value is measured individually for each key at the beginning of the keystroke and will be applied to each note separately. Velocity negative inverts the output. 21: Key Track. Value increases for higher notes and decreases for lower notes. 22…25 Mod wheel, Pitch Bend, Channel aftertouch, Poly aftertouch
see Keyboard and controls 26..28: Expression. Processes Expression and Sustain messages from an external MIDI device. Xsynth itself does not feature a connector for an Expression pedal or Sustain pedal. 29: Portamento: Glide parameter 30…34: Inverted versions of Channel aftertouch, Poly aftertouch, Key track, Mod wheel, Sustain 35: Constant: Continuous, non-changing value. Use this to countersteer offsets caused by other modulations.
NOTE: If a Source does not affect the Destination, make sure that the Source value is not zero. Also, check if the Destination value is already at the upper or lower limit. Modulations cannot push the Destination value out of bounds.
19.2 Destinations
0: LFO3 Rate see LFO section, Mostly used for Osc Pitch 1: Cutoff see Filter section 2…5 Pitch. Controls pitch of all three Oscillators separately. Osc1/2/3 Pitch control pitch for every Oscillator separately. 6: Amplitude: Regulates Env1 to Amp amount 7: Resonance see Filter section 8: Ring Mod. Output of Ring modulator see Mixer section 9: Ext in. Input from external audio signal 10: FM Amount. Regulates frequency modulation of Osc3 to Osc1 see Oscillators, Osc Global features section 12…13: LFO1, 2 rate see LFO section 14: OSC detune: Unisono Voice tune spread 15…17: OSC1/2/3 volume. Controls volume of each Osc separately 18…32: ENV1/2/3 stages. Controls each stage of evey Envelope separately
Modulation Matrix – Xsynth Manual – 51

64…79 To Node 1…16 / Mod1…16 Amount: Use this to control another slot with this slot. Sends the output of this slot as a control value to the designated target slot.
19.3 Walkthrough
· Initialize the current patch (GLOBAL, ENTER). · Play a few notes on the keyboard. A simple sound will be played. Try to memorize the timbre. · Press LFO. Set Rate with the rightmost of the Display Parameters encoders to 60. · Press MOD two times. The Display should now show a Page called ,,Mod Slot 1″. · Turn the leftmost of the four encoders and set Source to LFO1. · Use the second encoder and set Dest to OSC1Pitch and set Amount to 8% with the third encoder. Now you have set your first modulation. Press one key of the keyboard. You will hear the same sound like before, but now the pitch is drifting up and down rhythmically. · Use Mod Slot 1 Amount to control depth and LFO 1 Rate to control speed of your modulation. · Experiment with different values. Press a key after each change and observe the results.
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20. GLOBAL menu/system settings, Init patch
Administration of Xsynth’s system settings. Pressing GLOBAL once will call up the Init Sound function. By pressing Enter, the current patch will be reset to standard settings so you can start designing a sound from scratch.
NOTE: Executing the Init Patch function does not overwrite the currently selected patch. Use the SAVE function to store your creation when you’re done.
When Xsynth shows the Init Sound page, press the GLOBAL button again to access the next pages. These settings are independent from patches and will affect the entire instument.
Page 1/4 · Master Tune: Sets the main pitch frequency for note A4 in .1Hz steps. Standard=440Hz Changing this will shift all notes up or down in frequency, this applies to all Patches. · MIDIRxCh: Sets on which MIDI channel Xsynth will react to external notes. Standard is All. If Xsynth does not react to external MIDI notes, set this value to the channel on which the other device is sending. If unsure, set this to ALL then, Xsynth will listen on all channels (Omni mode). · MIDITxCh: Sets on which channel Xsynth will send out its MIDI data. · Local: Local On/Off. Couples/decouples Xsynth’s own keyboard from the sound engine. When set to OFF, Xsynth will only send MIDI data out when its keyboard is played, but the sound engine will not play these notes. This setting can be used when Xsynth is connected to a DAW which pings back the MIDI notes from Xsynth’s own keyboard. This way, a MIDI feedback loop can be avoided.
NOTE: Local will be reset to ON every time the device is rebooted. This safety measure has been implemented in order to reduce support inquiries because of suddenly muted outputs.
GLOBAL menu/system settings, Init patch – Xsynth Manual – 53

Page 2/4 · PatchChange: Determines whether selection of a new patch will load it instantly or after pressing Enter. · WavDisplay: Toggles oscilloscope visualization of sound output. · DispTime: When sound output has faded out, the Wave Display will still be displayed for this time until the last selected page will be shown again. · SustainMode: Changes operation of the HOLD button to the left hand side of the keyboard. Latch: When HOLD is pressed, it remains on until it is pressed again. Momentary: HOLD is only active as long as the button is being pressed. see Keyboard control buttons section
Page 3/4 · DINMIDIOut: Enables/disables transmission of MIDI data at the MIDI OUT port. This is set to OFF by default in order to minimize damages of equipment by accidentally connecting this port to an audio input of a different device. · DINMIDIInToEngine: Couples/decouples transmission from Din MIDI In to the synth engine. This setting can be set to OFF when you want the signals of an external MIDI device be forwarded to the computer through USB, but Xsynth itself should not react to these MIDI signals. · Channel vol: General output volume of Xsynth. · Version: Displays the current version number. To change this, update to the latest version.
WARNING: Do not set Channel vol to zero, otherwise there will be no sound output. Also, you will be struck by a flying ice cream truck.
Page 4/4 · AudioInterface: When set to OFF, this disables the Audio Interface and changes the USB class descriptor. Then, Xsynth will only be a MIDI device. Use this setting if you want to connect Xsynth to another standalone device which has as MIDI Host function that cannot connect to audio interfaces. After changing this setting, Xsynth needs to be rebooted.
54 – GLOBAL menu/system settings, Init patch – Xsynth Manual

21. Saving Patches
When you create a sound, make sure you save your data. · Press SAVE on Xsynth to call up the Patch Save page. Xsynth now asks you where to which slot you want to save and under which name. · Use the leftmost of the DISPLAY PARAMETERS encoder to choose the slot number and the second encoder for selecting the bank. · Use the Page buttons for navigating the cursor to the left and right. · Enter the letters through pressing keys on the keyboard. Each key has several characters assigned, press several times to go through them.
Overview
Lower Octave C: a, A, b, B C#:1 D: c, C, d, D Eb:2 E: e,E, f, F F: g, G, h, H F#: 3 G: i, I, j, J G#: 4 A: k, K, l, L Bb: 5 B:m, M, n, N
Saving Patches – Xsynth Manual – 55

Upper Octave C: o, O, p, P C#:6 D: q, Q, r, R Eb: 7 E: s, S, t, T F: u, U, v, V F#: 8 G: w, W, x, X G#: 9 A: y, Y, z, Z Bb: 0, B: [DELETE] (erase character at cursor position and move cursor one position to left) Upper C: [SPACE] Turning Patch Select changes the currently selected character. When done, press ENTER. Xsynth will display ,,SAVE OK” then. Or press CANCEL to abort.
56 – Saving Patches – Xsynth Manual

22. MIDI
22.1 Introduction
For a better cooperation between electronic instruments, the MIDI protocol was published in 1983. This protocol remains in use until today and connects MIDI devices between each other as well as these devices and computers.
MIDI transmits control signals generated by keystrokes, encoders, buttons etc. However, MIDI does not transmit any audio signals.
Take a look at the QWERTY (or whatever) keyboard of your computer, like the one this manual has been typed on. The keystrokes on the keyboard are transformed in a signal that is passed on to your computer. The graphic representation of the letters on the screen are generated by the computer, but not by the keyboard itself.
Synthesizers work in a similar way. Here, also a keyboard sends a signal to a different circuit which then generates an audible note. This signal standard for notes, controllers etc. is called MIDI.
Soon after its introduction, more and more manufacturers integrated this protocol into their synthesizers, keyboards, organs and other key instruments, as well as drum computers, FX units and many more. Also, sequencers and Digital Audio Workstations (DAW) are able to create, record, manipulate and arrange these data. With a DAW, you can record notes played on Xsynth and play them back to the instrument. Also, you can play software instruments (VST/AU/AAX etc.) in your computer with Xsynth’s keys. Try it out!
NOTE: Please refer to the manual of your DAW on how to configure and use MIDI input devices. This greatly differs from DAW to DAW and even within versions, so we cannot offer a walkthrough here. It may be similar to the following:
First, look into your DAW’s Settings and check if Xsynth is recognized and activated as a MIDI input device. Then, assign Xsynth to a MIDI or Instrument track. Be careful, some DAWs automatically play back Xsynth’s own notes to the instruments which can create a MIDI Feedback loop!
MIDI – Xsynth Manual – 57

22.2 Connecting MIDI, signal directions
Most users will be perfectly fine with Xsynth being connected through USB with their computer. Then, Xsynth will appear by its name in your DAW settings, both as MIDI device/controller and as an audio interface.
If you decide to use DIN MIDI, connect the MIDI OUT of Xsynth the other device’s MIDI in and Xsynth’s MIDI IN the other device’s MIDI OUT. Connect Xsynth to a standard 3.5mm to DIN converter if needed.
Xsynth uses TRS-A pin layout. Make these connections while all devices are switched off and switch them on when everything is connected. see Connection types and signal directions section
22.3 MIDI Interface
Connect Xsynth to your computer through USB. Then, your computer will list the following:
Inputs: Xsynth: Xsynth’s own keyboard input MIDIIN2 (Xsynth): DIN MIDI input from external device connected to MIDI IN jack
Outputs: Xsynth: To Xsynth’s own sound engine MIDIOUT2 (Xsynth): To external MIDI device connected to MIDI OUT jack
58 – MIDI – Xsynth Manual

22.4 Settings, Avoiding MIDI feedback (Local On/Off)
Xsynth’s own keyboard can be decoupled from the internal sound engine with the Local On/Off function in GLOBAL. When set to Off, Xsynth’s keys will send notes out through MIDI, but the internal synth engine will not react to these notes.
This mode can be needed if you use Xsynth with a DAW that sends all input notes right back to Xsynth. This can create a MIDI feedback loop, resulting in many notes sent back and forth between Xsynth and your DAW which can make normal playing of notes impossible.
When Local=Off, the notes sent back through MIDI will trigger the internal synth engine but Xsynth will not send these notes out again.
NOTE: When Local is set to Off while no other MIDI device or DAW is connected to your Xsynth, there will be no sound output! Local will be reset to ON every time the device is rebooted. This safety measure has been implemented in order to reduce support inquiries because of suddenly muted outputs. If you do it anyway and contact our support, you owe them a drink of their choice.
DIN MIDI Output may have to be switched on in GLOBAL before it becomes active. This is set to OFF by default in order to minimize damages of equipment by accidentally connecting this port to an audio input of a different device.
Also available in GLOBAL: DINMIDIInToEngine On/Off This activates/deactivates transmission from Din MIDI In to the synth engine. This setting can be set to OFF when you want the signals of an external MIDI device to be forwarded to the computer through USB, but Xsynth itself should not react to these MIDI signals.
MIDI – Xsynth Manual – 59

22.5 MIDI Implementation Description
Xsynth can receive and transmit the following MIDI messages on all channels: · Note On/Off · Control Change (CC) · RPN, NRPN · System Exclusive (SysEx)
The four DISPLAY PARAMETERS encoders can be used to send user-definable CC messages. Press MACRO+GLOBAL to access this function. see CC Send section NOTE: The preset CC numbers may seem odd, but they have been chosen so that the CC messages generated from this feature will not interfere with Xsynth’s other settings. You can change the assigned CCs in Editor>Global>MIDI CC at your own risk. CCs above 119 are not available for safety reasons. These can cause suddenly muted outputs on Xsynth as well as other devices. A detailed SysEx documentation is available upon request, please contact ESI.
60 – MIDI – Xsynth Manual

23. Editor
A free Editor app for mac and Windows is provided for Xsynth on esi-audio.com. Use it to: · edit your sounds · backup and recall your data · adjust system settings · update Xsynth’s firmware
First of all, make sure your Xsynth is connected through USB to your computer and switched on. Download, unzip and open the Editor app on your computer. Check if Device Out and Device in show Xsynth as a device. If this is not the case, press Refresh and recheck if Xsynth is connected properly. NOTE: On some OS, Xsynth cannot be connected through MIDI to the Editor and your DAW at the same time. You may get strange error messages like ,,Not enough memory available” or similar although your computer has more than enough memory. In this case, make sure only your DAW or the Editor is open, not both at the same time.
Editor – Xsynth Manual – 61

23.1 Handling
The Editor features the following controls: · Value dials/Potentiometers: round with a dot as an indicator of the current value. Click on them, hold the mouse button and drag the mouse upwards or to the right to increase and in the opposite directions to decrease their value. You may also click onto the value box below the dial and enter the new value manually by typing in the desired number on your computer’s QWERTY keyboard. Press Enter/Return when done. · Buttons: rectangular with rounded edges, these show their function or current state. Clicking on them activates their function or toggles between states. · Dropdown boxes: rectangular with rounded edges and a triangle pointing downwards. Click on them and select the new value from the menu or hover your cursor over the dropdown box and scroll/turn the mouse wheel to dial through values.
Some pages feature saving and recalling their own settings.
NOTE: On the OSC and AUX page, you can restore the last saved value by double-clicking on a control.
23.2 Pages
Please see the corresponding sections for detailed explanation. This chapter will focus on the controls which have not been explained in the chapters before.
OSC Oscillators, Envelopes, LFOs Mixer: Mixes Oscillators together. Ext Level: Volume of Ext Source. Ext Source: Selects whether output from Computer (USB) or Aux In (Analog) should be used as playback source Pitch: Sets Pitch Glide (Portamento) mode and rate. Bend Range: Sets Pitchbend ( – PITCH + button) range in semitones.
62 – Editor – Xsynth Manual

Filter: PreFilter: Volume control for the signal from the Mixer before it enters the Filter Voice: Polyphonic On/Off: Toggles if Patch is polyphonic or monophonic Unison: Enables Unisono mode. This stacks multiple Voices on one key. Uni Voices determines how many voices are on one key and Detune adjusts tune spread between the voices. Transpose, Fine Tune: Adjusts pitch shifting for this Patch. There is another Transpose in GLOBAL which works for the whole device and all Patches.
MOD Modulation Matrix with 16 Modulation slots
AUX Effects: Post level: Adjusts output level of every effect EQ: Equalizer for this patch Arpeggiator: Pattern: Choose your Arp pattern from many pre-programmed ones
MACRO M1…M4 quick access settings
GLOBAL Channel: Global Volume settings. Direct: Playback volume from computer MIDI: Receiving channel, sending channel, receiving of clock Touch curve: Velocity curve and Aftertouch curve response settings. Select from several Velocity (Touch) and Aftertouch curves. Toggle between Polyphonic and Monophonic (Channel) aftertouch. Global Touch Curve On/Off: When on, factory calibration data sets for all keys are ignored and default setting is used for all keys. MIDI CC: Settings for CC Send pages 1-4, activated by pressing MACRO and GLOBAL buttons on Xsynth hardware at the same time. System: Local On/Off: Disconnects Xsynth’s own keyboard from synth engine when OFF. Sustain Mode: How HOLD button works. Momentary: HOLD will only be active for as long as it is pressed. Latch: Press HOLD and it will be active until it is pressed again. RealWaveSensi: Zoom in/out of Wave Display, Global Octave/Transpose: Keyboard transpose for all patches
Editor – Xsynth Manual – 63

Factory reset: Resets all parameters, configuration data and all Sound Patches to factory settings. WARNING: Performing a Factory Reset erases ALL data on Xsynth: all settings, patches configuration data etc. Only use this when you have a backup of all your patches or when you want to wipe Xsynth’s memory completely. However, this does not erase your bad memories about your ex partner. Update firmware: see corresponding section in Quickstart
Expert mode You have reached the world’s edge, none but devils play past here. NOTE: We have put this page behind a lock for a reason. If something on your Xsynth does not work as expected, do not just randomly change some settings on this page. You may cause even more problems by doing so. Here, you can set the current Patch as the new Init Patch. Also, this page contains settings for Velocity and Aftertouch curves, as well as Aftertouch responsiveness, Keyboard calibration and Keyboard scanner settings.
Only proceed if you know what you are doing, otherwise Xsynth’s own keyboard may become sluggish and unusable. We recommend to not change these settings unless instructed by our support team. If you messed up the settings, you can use the Reset all button in the upper right corner. This loads default values for this Page.
Thanks for reading through all of this manual. Parts of this document have been written in the middle of the night on a plane with lots of turbulence and at the wave table dance bar in Waldorf. Please excuse the chaos.
64 – Editor – Xsynth Manual

Appendix
Contains diagrams in bigger size. The vermiform appendix has already been removed.

Appendix – Xsynth Manual – 65

AHDSR Envelope 66 – Appendix – Xsynth Manual

Comparison Low pass/High pass/Band pass Appendix – Xsynth Manual – 67

68 – Appendix – Xsynth Manual

– Xsynth Manual – 69

70 – – Xsynth Manual

Proof: Xsynth fits onto the rear galley of an Airbus A350

– Xsynth Manual – 71

24. Legal note
A4=442.3Hz would still be a legal note. Now, seriously:
You are free to use all sounds from Xsynth in your music for both commercial and private use. However, you may not build a sample library for commercial use and/or resale which uses unaltered factory presets and/or raw waveforms from Xsynth and you may not claim any of these as your own work.
This manual has been written with utmost care. However, we deny any liability for any damages, injuries, loss of data and/or profits which may result from the information herein or from incomplete or incorrect information in this document.
Xsynth has no user-servicable parts inside. Do not open the case and do not try ro remove the keys. Attempting to open the device or to remove the keys will void the warranty and possibly result in unrepairable damage of the device and/or personal injury.
Xsynth’s ports must only be used with the corresponding signal sources or receivers. MIDI input signals must not exceed 5V. Power supplied through USB must not exceed 5V. Aux In signals must not exceed Line level. Do not connect any outputs to other outputs. Do not connect Control Voltage (CV) from modular synthesizers to any of Xsynth’s ports.
Non-compliance of the instructions from this manual may void the warranty, result in damage and/or injury and forfeits all legal claims towards ESI, Artesia Pro or any of their representatives.
Any reverse-engineering of Xsynth’s firmware, waveforms, memory content, Editor software and hardware is strictly prohibited.
The contents of this document are protected by copyright law. Copying of information and data, including but not limited to texts and picture material, requires our written consent; except for short quotations for use in reviews and press articles about Xsynth and for educational purposes.
72 – Legal note – Xsynth Manual

Manual written by Lukas Schütte. Layout by Sakeena Dietrich. Sound designers: Dirk Krause, Johannes ,,JayB” Berthold, Carsten ,,Casi” Schmid, Lukas Schütte, Manfred Maraun Big thanks to: Paul Whittington, Till Kopper, Dietmar Belloff Greetings to our friends at Waldorf! Get in touch with us! We look forward to hearing from you. Our support team mostly just gets messages when something does not work. Write to them when you are happy with your Xsynth and that it works as expected. This will really make their day. ESI is represented by: ESI Audiotechnik GmbH Mollenbachstr. 14 71229 Leonberg Germany
© ESI Audiotechnik GmbH, 2024-2025
Legal note – Xsynth Manual – 73

Satisfied? If something is not working as expected, please don’t return the product and first use our technical support options via www.esiaudio.com or contact your local distributor. Do not hesitate to give us feedback or write a review online. We love to hear from you so we can improve our products!
Trademarks ESI and Xsynth are trademarks of ESI Audiotechnik GmbH. Windows is a trademark of Microsoft Corporation. Other product and brand names are trademarks or registered trademarks of their respective companies.
The FCC and CE Regulation Warning This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Caution: Any changes or modifications in construction of this device with are not expressly approved by the party responsible for compliance, could void the user’s authority to operate equipment.
Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. If necessary, consult an experienced radio/television technician for additional suggestions.
Correspondence For technical support inquiries, contact your nearest dealer, local distributor or ESI support online at www.esi-audio.com. Please also check our extensive Knowledge Base with Frequently Asked Questions, installation videos and technical details about our products in the support section of our website.
Disclaimer All features and specifications subject to change without notice. Parts of this manual are continually being updated. Please check our web site www.esi-audio.com occasionally for the most recent update information.
74 – Legal note – Xsynth Manual

Documents / Resources

ESI Audio Xsynth Portable synthesizer [pdf] User Manual
Xsynth Portable synthesizer, Portable synthesizer, synthesizer

References

User Manual

Xsynth Portable synthesizer

Specifications:

Product Usage Instructions:

3. Quickstart

3.1 Setup

3.2 Using the Synthesizer