Boss ME-90

BOSS ME-90 Guitar Multi-effects Pedal Instruction Manual

Model: ME-90

1. Introduction and Overview

The BOSS ME-90 is an advanced all-in-one guitar processor designed to provide a wide array of high-quality effects and amplifier models in a user-friendly format. It features superior 24-bit AD/DA conversion and powerful 32-bit floating-point processing, ensuring pristine audio quality.

This multi-effects pedal integrates 11 onboard AIRD amp models and 60 flagship-grade effects across seven simultaneous effects categories. Its intuitive stompbox-style operation, combined with eight multifunction footswitches and an expression pedal, offers extensive real-time control for live performance and studio work.

The ME-90 supports both Manual mode for traditional pedalboard-style operation and Memory mode for quick recall of complete patch setups. For deeper editing and customization, the BOSS Tone Studio software provides comprehensive parameter control, amp and effects configuration, and access to a premium-quality IR loader. Connectivity options include an effects loop, USB-C for direct recording, and Bluetooth capabilities via an optional adapter.

2. Key Features

All-in-One Guitar Processor: Dedicated amp section with 11 onboard AIRD amp models, 7 simultaneous effects categories with 60 BOSS effects, and 8 multifunction footswitches with an expression pedal for real-time control.
Flexible Patch Management: 36 ready-to-play preset patches and 36 user patches. Manual mode for pedalboard-style operation and Memory mode for toggling between complete patch setups.
Intuitive Interface: Colored LEDs and a stompbox-style layout for quick reference on the knob-driven interface.
Connectivity: FX loop for integration with external gear, USB-C port for direct recording or playback to your DAW.
Expandable Tones: BOSS Tone Studio software for fast-and-easy parameter editing and amp/effects configuration. Import up to 3 user speaker emulations in the IR loader and access ME-90 Livesets via BOSS Tone Exchange.
Power Options: Can be powered by batteries or the included PSA-120 adapter, ensuring stable performance.

3. Setup

3.1 Power Connection

The ME-90 can be powered by batteries or the included BOSS PSA-120 AC adapter. For stable and consistent performance, especially during extended use or live performances, it is recommended to use the AC adapter.

Using the AC Adapter: Connect the small plug of the PSA-120 adapter to the DC IN jack on the ME-90. Plug the adapter into a standard AC outlet. The green status light on the adapter will indicate power.
Using Batteries: The ME-90 can operate on AA batteries (not included). Open the battery compartment on the underside of the unit and insert the batteries, observing correct polarity. The 'BATTERY LOW' indicator on the display will illuminate when battery power is low.

3.2 Connecting Your Guitar and Amplifier

Connect your guitar to the INPUT jack on the ME-90 using a standard 1/4-inch instrument cable.
Connect the OUTPUT (L/MONO, R) jacks of the ME-90 to your guitar amplifier, mixer, or audio interface using 1/4-inch instrument cables. For mono operation, use the L/MONO output.

4. Controls and Functions

The BOSS ME-90 features a comprehensive set of controls, including knobs, footswitches, and an expression pedal, allowing for detailed sound shaping and real-time performance adjustments. Refer to the image below for a visual guide to the controls.

BOSS ME-90 Guitar Multi-effects Pedal with all controls and connections visible.

Figure 4.1: BOSS ME-90 Front Panel Layout

4.1 Top Panel Controls

Preamp Section

This section controls the amplifier simulation and tone shaping. Adjust the knobs to dial in your desired amplifier sound.

GAIN: Adjusts the input gain, affecting the amount of distortion and sustain.
BASS: Controls the low-frequency response of the amplifier.
MIDDLE: Controls the mid-frequency response, crucial for presence and cut.
TREBLE: Controls the high-frequency response, affecting brightness.
LEVEL: Sets the overall output volume of the preamp section.
Amp Models: Select from various amplifier types including X-MODDED, JUGGERNAUT, MAXIMUM, X-HI GAIN, X-CRUNCH, NATURAL, TWIN COMBO, TWEED COMBO, DIAMOND, BRIT STACK, and RECTI STACK.

EQ/FX2 Section

This section provides equalization and additional effects.

RATE/TIME: Adjusts the speed or timing of effects like Phaser, Tremolo/Pan, Delay, and Chorus.
DEPTH/FB: Controls the intensity or feedback of effects.
LEVEL: Sets the output level of the selected effect.
Effect Types: PHASER, TREM/PAN, BOOST, DELAY, CHORUS, EQ.

Reverb Section

Adds spatial ambience to your sound.

LEVEL: Controls the amount of reverb mixed with the dry signal.
Reverb Types: ROOM, HALL, SPRING.

Comp/FX1 Section

This section includes compressor and various special effects.

SUSTAIN/SENS/-10CT: Controls sustain for compressor or sensitivity for other effects.
ATTACK/LEVEL/-20CT: Adjusts attack for compressor or level for other effects.
LEVEL/TONE/PEAK/DIRECT: Controls output level, tone, or peak for specific effects.
Effect Types: HUMANIZER, OCTAVE, DEFRETTER, SLOW GEAR, T. WAH UP, COMP, FEEDBACKER, AC SIM, SOLO, TUNE DOWN, S-BEND.

OD/DS Section

Provides various overdrive and distortion effects.

DRIVE: Adjusts the amount of overdrive/distortion.
TONE: Controls the tonal character of the overdrive/distortion.
LEVEL: Sets the output volume of the overdrive/distortion effect.
Effect Types: BLUES OD, CENTA OD, T-SCREAM, OVERDRIVE, BOOST, TURBO DS, RAT DS, METAL DS, CORE, MUFF FUZZ.

Mod Section

Offers a range of modulation effects.

RATE/KEY: Adjusts the speed of the modulation or key for pitch effects.
DEPTH/HARMONY: Controls the intensity of the modulation or harmony interval.
E. LEVEL/RESONANCE: Sets the effect level or resonance for certain effects.
Effect Types: PITCH SHIFT (HARMONIST), VIBRATO, CHORUS, TREMOLO, FLANGER, PHASER, ROTARY, UNI-V, DELAY, OVERTONE.

Delay Section

Provides various delay effects.

TIME: Adjusts the delay time.
FEEDBACK: Controls the number of delay repeats.
E. LEVEL: Sets the volume of the delayed signal.
Effect Types: REVERSE, MODULATE, WARM, TAPE, ANALOG, STANDARD, TEMPO, TERA ECHO, SHIMMER, PHRASE LOOP, REVERB.

Pedal FX Section

Configures the expression pedal's function.

OUTPUT LEVEL: Controls the overall output level of the unit.
Pedal FX Types: -2 OCT, -1 OCT, +2 OCT, +1 OCT, VOICE, WAH, OSC DELAY, OD/DS, MOD RATE, DELAY LEVEL.

Display and Indicators

8.8 Display: Shows patch numbers, parameter values, and tuner information.
BATTERY LOW: Indicator light for low battery power.
EXIT Button: Used to exit menus or cancel operations.
WRITE Button: Used to save edited patches.

Footswitches and Expression Pedal

BANK AMP (1 COMP): Footswitch for Bank 1, also activates Compressor effect.
BANK EQ (2 OD/DS): Footswitch for Bank 2, also activates Overdrive/Distortion effect.
CTL REV (3 MOD): Footswitch for Control/Reverb, also activates Modulation effect.
4 DELAY: Footswitch for Bank 4, also activates Delay effect.
Expression Pedal: Controls parameters like volume, wah, or other assigned effects in real-time.

5. Operating Modes

The ME-90 offers different operating modes to suit various performance and practice needs.

Manual Mode: In this mode, the ME-90 functions like a traditional pedalboard, where each footswitch directly turns individual effects on or off. This provides immediate, hands-on control over your sound.
Memory Mode: This mode allows you to switch between complete patch setups (combinations of amp models and effects with their settings). You can store and recall 36 preset patches and 36 user patches.
Tuner Mode: The built-in tuner can be accessed by holding down a specific footswitch (indicated as 'TUNER: HOLD' on the unit). The display will show tuning information.

6. Connecting to External Devices

6.1 USB-C Connectivity

The USB-C port allows the ME-90 to function as an audio interface for direct recording to a Digital Audio Workstation (DAW) on your computer. It also enables playback of audio from your computer through the ME-90.

6.2 Effects Loop (FX Loop)

The integrated FX loop allows you to connect external effects pedals or other gear into the ME-90's signal chain, expanding your tonal possibilities.

6.3 Bluetooth (Optional Adapter)

With an optional Bluetooth adapter, the ME-90 can connect wirelessly to compatible devices for audio streaming or remote control via the BOSS Tone Studio app.

7. BOSS Tone Studio Software

The BOSS Tone Studio software is a powerful companion application for the ME-90, providing a graphical interface for in-depth editing and management of your patches.

Parameter Editing: Easily adjust all amp and effect parameters with a visual interface.
Patch Management: Organize, backup, and load patches to and from your ME-90.
IR Loader: Import up to 3 user speaker impulse responses (IRs) to customize your cabinet simulations.
BOSS Tone Exchange: Access and share ME-90 Livesets and custom patches with a global community of users.

Download the latest version of BOSS Tone Studio from the official BOSS website.

8. Maintenance

Cleaning: Use a soft, dry cloth to clean the unit. Avoid abrasive cleaners or solvents.
Storage: Store the ME-90 in a dry, cool place away from direct sunlight and extreme temperatures.
Battery Replacement: If using batteries, replace them promptly when the 'BATTERY LOW' indicator appears to ensure optimal performance and prevent leakage.
Firmware Updates: Periodically check the official BOSS website for firmware updates to ensure your ME-90 has the latest features and bug fixes.

9. Troubleshooting

9.1 No Sound

Check all cable connections (guitar, ME-90, amplifier).
Ensure the ME-90 is powered on and the power adapter is securely connected or batteries are fresh.
Verify that the volume knobs on your guitar, ME-90, and amplifier are turned up.
Check if any effects are bypassed or if the expression pedal is set to minimum volume.

9.2 Unexpected Sound or Noise

Ensure all cables are in good condition and properly shielded.
Check for ground loops if connecting to multiple devices.
Reduce the GAIN or DRIVE settings if the sound is overly distorted or noisy.
Ensure the correct input level is set for your guitar.

9.3 Footswitches Not Responding

Ensure the unit is powered on.
Check if the unit is in a mode where footswitches have different functions (e.g., Tuner mode).
Perform a factory reset if issues persist (refer to the official BOSS ME-90 manual for specific instructions on factory reset procedures).

10. Specifications

Specification	Value
Item Weight	9.28 pounds
Package Dimensions	24 x 13 x 6 inches
ASIN	B0CKWJ6RZG
Date First Available	October 11, 2023
Hardware Interface	USB Type C
Signal Format	Analog
Power Source	Battery Powered, Corded Electric
Brand	Boss
UPC	643781556160
Manufacturer	Boss

11. Warranty and Support

For detailed warranty information and customer support, please refer to the official BOSS website or contact your authorized BOSS dealer. Keep your purchase receipt as proof of purchase for warranty claims.

Online resources, including updated manuals, FAQs, and software downloads, are available on the official BOSS support page.

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