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Sonuus G2M Universal Guitar to MIDI Converter

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Quick Overview

Universal Guitar to MIDI Converter


G2M—Universal Guitar to MIDI Converter

Any electric guitar can be used as a solo MIDI guitar

Also works with bass, voice and wind instruments

Really is plug-and-play

Fast & accurate

Near zero latency


In 2009, the G2M™ was launched and it rocked the guitar world. For the first time guitarists could access MIDI sounds with the same ease as a keyboard player.

Two years later, we updated the G2M™ to give it a substantial boost in performance (Version 2).

Now, 7 years since we introduced the original G2M™ a new benchmark in accessible MIDI Guitar has been created: the Version 3 G2M. It includes several significant improvements, all whilst preserving the trademark plug-and-play usability of the original. 


New in Version 3

Latest state-of-the-art pitch-to-MIDI algorithms by Sonuus
Guitar, Bass, Voice and Wind (replaces the older Sonuus B2M and G2M)

20dB more headroom compared to the previous G2M and B2M

More convenient power: single AA battery instead of a PP3

Option to use a 9V DC power adapter: pedal-board integration

DIP switches inside battery compartment for configuration

MIDI-In feature: MIDI hold, sustain and volume (using special breakout cable)


Key Features

The G2M™ is a simple-to-use, highly effective, guitar-to-MIDI converter. It is “Universal” because it doesn't need a special pick-up mounted on your guitar, but instead simply connects to your guitar like any other effects pedal or tuner.

Designed to give accurate triggering, with very low-latency, it is a true plug-and-play solution for monophonic MIDI guitar. It can be used to sequence bass lines and guitar solos add an edge to your live performances — it opens up many creative possibilities.

Any electric guitar/basscan be used as a solo MIDI guitar/bass.

No instrument modifications or special pickups required.
Robust note detection — minimises wrong notes.

Fast, accurate pitch-bend determination, or chromatic mode.

Very low latency & very fast tracking.

Built-in precision tuner for standard guitar/bass tuning.

Battery-powered with long battery life.

Compact, lightweight and portable.


Universal Appeal

No modifications are required to your guitar; no special pickups to install; and nothing needs to be “stuck” onto your instrument. It works with all electric guitars.

The G2M™ universally appeals to all guitarists from novices to seasoned professionals. Keenly priced to fit any budget, with the robust reliable performance expected by the finest stagemen.


Incredibly simple to use:

Plug your guitar or bass or microphone into IN to power-up the G2M™

Connect your MIDI device (or computer) to the MIDI OUT

Play notes on your guitar and MIDI will be sent out!


Powered from a single AA battery, its long battery life combined with small size makes the G2M™ the ideal accessory to keep with your guitar. Not only does it provide fast and precise tuning, but it also gives you instant MIDI capability for any electric guitar!

  "The MIDI solution for all guitarists" 


Robust Performance

Research has shown us that the most important aspect for pitch-to-MIDI conversion is reliable and reproducible triggering of notes. While low-latency is important, robust triggering is the key to usability — you can easily adapt to some latency, but you cannot adapt to random, spurious notes. The G2M™ gives you both!

By virtue of the unique, inherently robust technology used in the G2M™ you will be able to reliably generate accurate MIDI quickly and easily. Notes are generated exactly as played, and the nuances of your performance are captured with fast, accurate pitch-bend data.


Built-in Tuner

The built-in tuner uses our PULSAR™ tuning technology where the power LED doubles as a tuning indicator. This innovative tuner gives you a fast and accurate way to tune your guitar.


Instrument Thru

Featuring a high-impedance input circuit, the G2M™ won't sap your tone when using it "in-line" before your amp, or other effects pedals. You can then easily combine MIDI sounds with your normal guitar sound for some exciting musical possibilities.


Improves Playing Technique

For optimal MIDI conversion, your guitar playing needs to be clean and accurate. Accidental notes, resonating open strings and other sounds can often be converted into undesired MIDI notes. Often you don’t hear these when playing guitar yourself, but can detect them easily when listening live to the generated MIDI.

Striving to improve MIDI note accuracy, encourages clean picking and accurate fingering, with good control over non-sounding strings by damping them.

Not only will your MIDI output be more accurate, your normal guitar playing will sound clearer and more professional. It’s like having a tutor sitting beside you giving you advice. It’s also great fun!


Most of all, it's Fun!

When you try the G2M™ and generate some new sounds, the first thing that strikes you is how much fun it is. Unleash new creative inspiration and invigorate your soul.

See our guide to using your G2M™.



Power supplyAA battery (typically more than 20 hours operating time)
9V DC PSU (max 30mA)
Tuner notesB1, E2, A2, D3, G3, B3, E4 (guitar/voice)
B0, E1, A1, D2, G2, C3, F3 (bass)
Tuner accuracy<1 cent when pulsing at <1Hz
Note detection range(E1 to C7) Guitar
(Db1 to A6) 4 String bass
(A0 to F6) 5 String bass
MIDI latency5ms (E6) to 19ms (E2) | 32ms (E1)
Pitch Bend<1 cent accuracy
±2, ±5, ±12, ±36 semitones
MIDI power5V (via 220 ohm resistor as per the MIDI specification)
Size83mm x 58mm x 34mm
Weight80g (without battery)
Inputs6.35mm mono jack (switches unit on when jack is inserted)
9V DC power jack, 2.1mm centre pin
Standard 5-pin MIDI (via breakout cable).
Outputs6.35mm mono jack connected directly to input jack. Standard 5-pin MIDI socket.
SwitchesCHROMATIC switch to enable/disable pitch-bending


Box Contents

G2M V3
Printed Operators' Manual (in English)


Note: the G2M™ doesn't include its own MIDI sounds, you must use a suitable MIDI synthesizer, sound module or your computer to record or to hear the MIDI output.