The Sonuus G2M is a guitar-to-MIDI converter built to sit on a pedalboard like any other stompbox. RockBoard's PedalPedia describes it as "a simple-to-use, highly effective, guitar-to-MIDI converter," designed for accurate triggering with very low latency and pitched as a true plug-and-play solution for monophonic MIDI guitar1. It belongs to the wider family of MIDI pedals and sits next to synth pedals as a way of getting a guitar to drive sounds a guitar amp never could.
What makes it unusual is that it needs no guitar modification. RockBoard's PedalPedia says it "doesn't need a special pick-up mounted on your guitar, but instead simply connects to your guitar" like a normal effects pedal or tuner1. It operates solely from the analog and magnetic signal your guitar already produces2.
Controls and connections
The G2M keeps its front panel minimal. MusicPlayers.com's review, by Derek Davodowich, lists the connections and the one control2:
- 1/4" input jack for your guitar2
- Standard 5-pin MIDI Out jack2
- 1/4" Signal Thru output jack, to pass your analog guitar tone to your amp2
- Signal Boost switch, so even vintage single-coil pickups will work2
- 9V battery power only, per the review2
The Signal Boost switch matters in practice: pitch tracking depends on a clean, strong signal from the pickups, and the boost gives lower-output vintage single-coils enough level for the converter to read reliably2.
The MusicPlayers.com review lists the G2M as 9V battery power only, while Sonuus's specification gives 9V DC center negative at 30mA. At 30mA it sits within the reach of many pedalboard power supplies, but a daisy chain shared with high-draw digital pedals is worth thinking twice about.
Because the Signal Thru jack carries your guitar tone onward, the G2M does not have to sit between you and your amp in the way a typical effect does. Your analog sound and the MIDI data go to separate places: the amp keeps your normal tone while the MIDI Out drives a keyboard, sound module or computer2.
Monophonic tracking
The G2M is a monophonic converter: it tracks one note at a time, not chords. Sonuus positions it for players who want to trigger synth and keyboard sounds from single-line playing, and it works entirely from the guitar's own signal rather than a hexaphonic or special pickup12. For players comparing options, that puts it at the simple end of the guitar-to-MIDI world: no installation, no pickup routing, just the guitar cable in and MIDI out.
Price and reception
When MusicPlayers.com reviewed the G2M in April 2009, it carried a $129.00 MSRP and a street price of $99.002. The reviewer's verdict was favorable on value:
"we believe the G2M to be an excellent value"
The review framed the appeal plainly: for less than the price of a stompbox, a player gets plug-and-play access to MIDI guitar without modifying the instrument, with an on-board tuner value included in the assessment2.
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Questions
Does the Sonuus G2M need a special pickup?
No. Sonuus describes the G2M as universal because it does not need a special pickup mounted on your guitar. It connects like a normal effects pedal or tuner, taking the ordinary analog signal from your guitar's existing pickups. A Signal Boost switch helps weaker signals, so even vintage single-coil pickups will work according to the maker.
Is the Sonuus G2M monophonic or polyphonic?
The G2M is monophonic: it tracks one note at a time. Sonuus describes it as a true plug-and-play solution for monophonic MIDI guitar, designed for accurate triggering with very low latency. It works solely from the analog or magnetic signal your guitar provides, so chords are not converted to MIDI.
Does the G2M run on a battery or a power supply?
The G2M runs on 9V DC, center negative, drawing 30mA. A 2009 review in MusicPlayers.com listed it as 9V battery power only. At 30mA it is within the range of most standard pedalboard power supplies, but check your supply's output ratings before daisy chaining.
What does the Signal Boost switch do?
The Signal Boost switch raises the level of the guitar signal feeding the converter. MusicPlayers.com's review notes it exists so that even vintage single-coil pickups will work, which matters because lower-output pickups can be harder for a pitch tracker to read reliably.
Can I still send my guitar tone to my amp with the G2M?
Yes. Alongside the 5-pin MIDI Out jack, the G2M has a 1/4-inch Signal Thru output jack that passes your analog guitar tone to your amp. Your guitar signal and the MIDI data go to separate destinations, so you can play a synth or sound module from your guitar without losing your normal amp tone.
Sources (2)
- G2M by Sonuus, RockBoard PedalPedia, 2026
- Sonuus G2M Universal Guitar to MIDI Converter, MusicPlayers.com, 2009-04-09