Crumar Mojo Classic & Suitcase User's Manual

Introduction

Congratulations on purchasing your new Crumar Mojo. The Mojo is a modern classic, built around the most recent technologies while feeling and sounding authentic. Enjoy years of musical enjoyment with your new digital tonewheel organ. This manual will help you explore its capabilities.

Safety and Warranty Information

• Do not open the instrument. Repairs should only be performed by qualified personnel. Unauthorized opening voids the warranty.
• Do not expose the instrument to rain or moisture.
• Do not expose the instrument to direct sunlight.
• Avoid infiltrating powders and liquids inside the instrument.
• If liquids enter the unit, immediately remove power to prevent electric shock and contact a service center.
• Do not use abrasive cleaners, as they may damage surfaces.
• Keep all packaging for potential transport to a service center.
• The instrument can be used in any country with a mains voltage between 100 Vac and 240 Vac.
• The Mojo Suitcase wooden enclosure is not compliant with A.T.A. regulations and cannot be loaded in an aircraft hold without a proper A.T.A. case.
• External parts (handles, hinges, locks, edge protectors, lid) are subject to wear and are not covered by warranty.
• The paint job is subject to wear and is not covered by warranty.
• Crumar Mojo is subject to a 12-month manufacturer's warranty.
• Warranty extensions are at the retailer's discretion.
• Damages caused by misuse, improper maintenance, or transportation are not covered by warranty.
• During the warranty period, defective parts will be repaired or replaced at no charge.
• Product replacement is at the manufacturer's discretion.

Chapter Summary

1. The Sound of Mojo
2. The Command Panel
3. The Rear Panel
4. Accessing the Editor
5. Organ Edit Parameters
6. Effect Edit Parameters
7. The USB Ports
8. MIDI Map
9. Specifications

Notes About This Manual

This manual is considered a live document and may be updated with new firmware releases. Check the Crumar website support section for the latest versions of the manual and firmware.

Some concepts may be repeated for clarity, with detailed explanations in later chapters.

It is recommended to read this manual with the instrument readily available to practice the explained functions and receive instant feedback.

1. THE SOUND OF MOJO

VB3-II Virtual Tonewheel Organ

The Crumar Mojo's sound engine is based on the GSi VB3-II virtual instrument, running on a dedicated DSP platform. This provides a familiar organ interface and one of the most realistic tonewheel organ simulations, with an extensive parameter set for customization.

Sound Engine Main Features:

• Full polyphony (61 upper + 61 lower + 25 pedals = 147 notes).
• 91 modeled tonewheels with accurate phase synchronization.
• Adjustable leakage noise and cross-modulation between tonewheels.
• 22 different tonewheel generators for 154 generator combinations.
• Adjustable global tuning from 430 to 450 Hz.
• Foldback on 16" deactivatable.
• Complex wheels.
• Resistor wiring with multiple options.
• Realistic "run" motor wow & flutter.
• Busbars and 9 key contact simulation.
• String Bass with adjustable release time.
• Loudness "robbing" effect.
• Single triggered percussion with natural capacitor discharge/recharge.
• Adjustable Percussion Level & Decay.
• Vibrato/Chorus virtual scanner.
• Adjustable Vibrato Scanner depth & mix.
• Dynamic tube overdrive simulation.
• Digital stereo reverb.
• Rotary speaker simulation with virtual microphone positioning, tube overdrive, and tube feedback.
• Rotors "Front Stop" brake position with adjustable preferred position.
• Upper and Lower manuals SPLIT with adjustable split point.
• Supports pedal sustain.

Hardware Main Features:

• Dual Manual Organ with two 61-note, 5-octave C-C waterfall semi-weighted, velocity-sensitive keyboards.
• External optional Wi-Fi antenna for accessing the editor Web-App.
• Online USB wired editor.
• Two Groups of 9 Real Drawbars plus 2 pedalboard drawbars.
• Knobs for: Volume, Drive, Reverb, Keyclick, Crosstalk, Percussion Volume, Balance, Distance, Bass, Middle, Treble.
• Four dedicated buttons for Tonewheel organ percussion.
• Dedicated buttons for Vibrato on/off.
• Vibrato type knob.
• Drawbar HOLD mode for alternate drawbar settings.
• Two drawbar presets per manual with easy storage mode.
• Dedicated button for rotary effect speeds.
• Pedal to Lower function (adds the sound of pedalboard to the lower manual).
• Shift button for alternate functions (transpose, rotary bypass).
• MIDI IN and OUT connections.
• USB Type B (device) for MIDI IN/OUT.
• 2 USB Type A (host) for software updates and Wi-Fi module.
• Balanced Audio outputs.
• Headphone jack.
• Expression pedal input.
• Sustain pedal input.
• Halfmoon or Footswitch input with dedicated selector.
• AC input: 100-240V.

2. THE COMMAND PANEL

This chapter details the controls on the Mojo's command panel, familiar to tonewheel organ veterans. Controls include drawbars, Vibrato Scanner, and percussion switches, logically arranged.

2.1 - LEFT SIDE KNOBS

Three knobs on the left side control: Volume, Overdrive, and Reverb. These are positioned for easy adjustment with the right hand during performance.

2.2 - VIBRATO/CHORUS

These controls mimic vintage tonewheel organs. Two large buttons activate/deactivate Vibrato/Chorus for the upper or lower manual independently. A large rotary encoder with 6 LEDs selects the effect type (V1-V3 for vibrato, C1-C3 for chorus).

Note: The illuminated buttons are push-push type. The C/V effect on the lower manual also applies to pedalboard tones.

2.3 - ROTARY SPEED BUTTON

This large horizontal button controls the built-in Rotary Speaker simulator. It switches between slow and fast speeds. Pushing and holding for approximately half a second engages the brake (stop position). Pushing again resumes the previous speed. An indicator light shows the current speed.

This button can be used with the SHIFT button to enable/disable the Rotary Speaker simulation. Note: Ensure the HM/FS selector on the back is set to FS (FootSwitch) for this button to function. It cannot be used if a Half-Moon switch is active.

2.4 – THE SHIFT BUTTON

The SHIFT button activates several alternate functions:

1. SHIFT + ROTARY SPEED: Toggles the internal Rotary Speaker simulation on/off. The red LED next to ROTARY SPEED indicates when the simulation is OFF.
2. SHIFT + MANUAL (Lower section) + PEDAL TO LOWER: Toggles the pedal-to-lower function, which routes pedalboard tones to the lower manual. The red LED indicates when this function is active.
3. SHIFT + notes (C2 to C4 on upper manual): Activates transposition. The red LED next to SHIFT indicates when transposition is active. To cancel, hold SHIFT and play the third C note (middle C).

Note: Transposition may render notes outside the 61-note range unavailable.

2.5 – UPPER PRESET

The Mojo offers two presets (A, B) per manual, plus CANCEL and HOLD modes, and manual drawbar mode. Presets store drawbar positions only. Percussion is automatically turned off on the upper manual when a preset is active, mirroring vintage organ behavior.

• To select a preset: Push the desired button (A or B).
• To use live drawbars: Push the MANUAL button.
• To store a preset: Set the drawbars to the desired position, then push and hold preset button A or B for approximately 2 seconds until the light cycles.
• HOLD mode: Allows preparation of an alternate drawbar registration while the current one remains active. The MANUAL button will blink. Changes are not applied until the MANUAL button is pressed again.
• CANCEL mode: Turns the manual off and enables MIDI output. Hold the MANUAL button until its light turns off. Resume by pushing the MANUAL button or one of the A or B preset buttons.

2.6 - LOWER PRESETS

Lower presets function identically to upper presets, with the exception that percussion is not available on the lower manual.

2.7 – RIGHT SIDE KNOBS

Top Row Knobs:

• CLICK: Adjusts the amount of keyclick noise.
• XTALK: Adjusts the amount of cross-talk effect.
• PERC. VOL: Adjusts the volume of the percussion sound.
• BALANCE: Adjusts the balance between the upper horn and the bass rotor for the internal Rotary Speaker simulation.
• DISTANCE: Adjusts the distance between virtual speakers and microphones for the internal Rotary Speaker simulation, affecting the perception of the Doppler effect.

Bottom Row Knobs:

• BASS, MIDDLE, TREBLE: A 3-band equalizer to balance the sound according to the amplification system and venue. The middle position provides a "flat" sound.

2.8 - PERCUSSION

The command panel features four percussion switches:

1. Turn percussion on or off.
2. Select between soft or normal percussion volume.
3. Select between fast or slow decay.
4. Select the harmonic applied to the percussion tone.

Note: Percussion is only present on the upper manual. The 1' drawbar is muted when percussion is active.

3. THE REAR PANEL

All connections are located on the back panel:

• HEADPHONES: For practicing without an external speaker; paralleled with the stereo line output.
• AUDIO L & R: Balanced line outputs (+4 dB level). Can accept TS (mono) jacks for unbalanced signals.
• SWELL: TSR Jack input for an expression pedal (10-50 Kohm range).
• SUSTAIN: Input for a sustain pedal to control Rotary Speaker speeds or sustain notes.
• HALFMOON or FOOTSWITCH: TRS Jack input and 2-way selector for controlling Rotary Speaker speeds with optional Crumar accessories.
• MIDI IN – OUT: Standard MIDI ports for connecting to other MIDI equipment.
• USB MIDI I/O (Type B): Connects to a computer or mobile device for Editor access or DAW integration. Carries MIDI signals only.
• SYSTEM USB (2x Type A): For USB Thumb drives (firmware updates), Wi-Fi USB dongle, or MIDI-USB controllers.
• Power Button & AC Plug.

Note: When the HM/FS Selector is in the HM position, the top panel Rotary Speed button is unresponsive. Set to FS for external footswitch or integrated button use.

4. ACCESSING THE EDITOR

The Crumar Mojo's parameters can be adjusted using the Editor software, accessible via two methods:

1. Remote MIDI Editor: Accessible through the USB MIDI I/O port and a connected computer or mobile device.
2. Internal Editor: Accessible via a Wi-Fi connection, where the Mojo acts as a hot-spot.

4.2 – OPTION # 1 – USB online Editor

Connect the Mojo to a computer, Android device (with OTG adapter), or iPad (with Camera Connection Kit) using a USB cable to the USB MIDI I/O port. Launch the CHROME browser and navigate to: https://www.gsidsp.com/mojoclassic.

Note: CHROME browser is recommended for compatibility.

4.1 - OPTION # 2 – Wi-Fi Editor

Connect the optional USB Wi-Fi dongle to one of the SYSTEM USB ports (with the Mojo turned off). Turn on the instrument. Scan for Wi-Fi networks and connect to the "Mojo-xxxxxx" SSID. If prompted about no internet, dismiss the warning. Then, use your web browser to navigate to: http://192.168.1.1/.

Note: The Wi-Fi access point supports only one connection at a time.

4.3 - EDITOR HOME PAGE

After connecting, the Editor loads into your web browser. The main screen displays Global Options. The top bar includes HOME, Snapshot (save/load), and Help icons. The bottom bar contains links to other pages.

Global Options:

• Tuning: Sets the global tuning reference (A note frequency, 430-450 Hz, default 440 Hz).
• TX Channel: Selects the MIDI Basic Channel for transmitting events.
• TX Velocity: Set to YES to transmit velocity information; NO fixes velocity at 127.
• CC Send: Choose whether to send all MIDI Continuous Controller messages, pedal-related messages, or none.
• CC Presets: Choose whether to send drawbar MIDI CC messages when an organ preset is selected.
• Sustain Pedal: Assigns function to the SUSTAIN connector: Rotary Speed (Latch/Momentary) or Sustain Upper/Lower/All.

4.4 - SNAPSHOTS

Save and recall up to 8 snapshots, storing all editing parameters. This allows for quick switching between different sound settings.

Use the Snapshot icon (red floppy disk to save, green folder to recall) to manage snapshots. The recalled snapshot becomes the default.

4.5 - PARAMETER EDITING

Access parameter pages via the bottom bar links. Parameters are adjusted using horizontal sliders with readout values. Scroll sliders to edit and scroll the page to view all parameters. Title bars can be clicked to collapse or expand sections.

5. ORGAN EDIT PARAMETERS

Parameters for the organ part:

• Generator: Selects a tonewheel generator based on real console organs.
• Generator Shape: OFF, or 3 levels of CUT and BOOST, affecting the amplitude chart.
• Leakage: Adjusts background hum and hiss.
• Crosstalk: Adjusts crosstalk from analog circuitry, crucial for tonewheel sound.
• Xtalk Shape: Mixes bass and treble tones of crosstalk for different tonal characteristics.
• Complex wheels: Special tonewheels for the first 12 pedalboard tones.
• Foldback on 16': Controls foldback behavior for the first 16 wheels.
• Resistor wires: Options for "Console: NEW", "Console: OLD", or "Spinet" wiring characteristics.
• Drawbar trims: Adjusts the presence of each drawbar.
• Percussion settings: Sets percussion level (normal/soft), decay time (fast/slow), overall level, and loudness loss.
• Perc Paradise Mod: A "hack" that prevents percussion from decaying, with unique vibrato interaction.
• Other settings: Adjusts vibrato depth, chorus mix, and KeyClick parameters.
• Preamp Bass / Treble: Adjusts the frequency response of the organ's built-in preamp.

Parameters for the Rotary Speaker:

• Horn slow / fast: Adjusts the speed offset for the horn.
• Bass slow / fast: Adjusts the speed offset for the bass rotor.
• Horn up / down: Adjusts acceleration and deceleration times for the horn.
• Bass up / down: Adjusts acceleration and deceleration times for the bass rotor.
• Ambience: Controls the amount of environmental reflections.
• Cabinet: Adjusts resonances caused by the wooden cabinet.
• Mic Angle: Adjusts the angle between microphones at the horn.
• Horn EQ: Adjusts the treble response of the horn sound.
• Mid reflections: Adjusts sound reflections in the middle of the stereo field.
• Doppler intensity: Controls the "Leslie" effect's cyclical untuning.
• Dry Leak: Adjusts the amount of dry signal mixed with the rotating sound.
• Bass Port: Adjusts sub-bass frequencies.
• Tube feedback: Affects amplification system dynamics, frequency response, and overdrive.
• Stop Position: Sets the preferred stop position for the horn and rotor when the brake is engaged.
• Noises: Adjusts audible noises from rotating elements and relays.
• Memphis Style: Unplugs the bass rotor motor, keeping the horns spinning.
• Front Stop: Ensures the horn and rotor stop at a "sweet" spot when the brake is engaged.

Notes on Rotation Speeds: Values are shown in Hz and Seconds. Convert Hz to RPM by multiplying by 60. Speeds vary between 50%-150%, ramp times between 50%-500% of center values. Center values for speeds and ramp times are provided.

6. EFFECT EDIT PARAMETERS

The Mojo features a high-quality stereo digital reverb adjustable for various artificial environments.

Reverb Settings:

• Decay: Adjusts the average reverb tail length.
• Damp: Simulates different wall types (e.g., tiles to absorber panels).
• Diffusion: Adjusts the diffusion of sound waves across surfaces.
• Pre-delay: Sets the time between the direct sound and early reflections.
• Room size: Adjusts the size of the virtual room.
• High / Low shelf: Adjusts treble or bass frequencies to be cut before reverberation.

7. THE USB PORTS

SYSTEM USB (2x Type A): Used for software updates, file functions, Wi-Fi USB dongle, and external MIDI accessories. Supports "Class-compliant USB-MIDI devices" without needing special drivers. Maximum current output is 250 mA. Do not use for charging mobile devices.

Compatible Crumar accessories include: Mojopedals 2018, G.M.LAB D9U/D9X drawbar controllers, and G.M.LAB MJU Midi Jack USB.

USB MIDI I/O (Type B): Connects the Mojo to a computer for MIDI IN/OUT, Editor access, and DAW integration. No drivers are required for Windows, OS X, and Linux.

8. MIDI MAP

The MIDI Map provides a detailed list of parameters, their corresponding CC numbers, and remarks for controlling the instrument via MIDI.

9. SPECIFICATIONS

Technical Specifications:

• Power rating: 100 ~ 240 Vac.
• Output level: +4 dBu.
• Headphone output max load: 32 ohm.
• Mojo Classic dimensions: 95 x 55 x 17 cm.
• Mojo Suitcase dimensions: 94 x 52 x 17 cm.
• Weight: 18 Kg.

The Crumar Mojo is a digital Musical Instrument designed and built in Italy. All rights reserved.

Crumar is a trademark owned by: V.M. Connection, Via Lucio Vero, 2 - 31056 Roncade (TV) - Italy. Visit www.Crumar.it.

Last update: June 2021.