GuitChordiLet’s play

OPEN-SOURCE FIRMWARE · M-VAVE FM-1

A little machine.
A whole lot
of strings.

Pick a chord. Brush the keys. Get lost in the groove.
Meet your FM-1’s softer, stringier side.

Play in browserMeet the beta

No download. No device needed. Sound starts when you switch on.

SIX STRINGS / ENDLESS DETOURS
GUIT / CHORD / STRUM
PRESETSOUND
GuitChordi boot screen: six green, orange and red strings, GuitChordi
✳ A chord companion.
Not another menu to get lost in.
16 instruments50 chord styles14 guitar tuningsFreeplay / Strum / Arp

01 / FIND YOUR COLOUR

From Sunday nylon
to after-hours jazz.

A steel-string shimmer. A mellow jazz guitar. A little harp, a little violin. Sixteen instrument colours to find a sound that feels like you.

YOUR FIRST CHORD

Nylon Acoustic

Warm nylon strings and a gentle attack. Starts in Strum mode: hold a black chord key and the rhythm comes to you.

Nylon · Steel · Jumbo · Palm-muted · Clean · Jazz

Try the instruments These are synthesized instrument colours, not sampled recordings. Switch on the browser instrument to hear them.

02 / LESS THINKING. MORE PLAYING.

You bring the feeling.
We’ll hold the chord.

01

Pick your harmony.

Eleven black keys, eleven chord slots. Choose a style, change a voicing, or follow the next-chord hints. Green is a smooth move. Amber adds colour. Red takes a detour.

02

Make it your own.

Brush the white keys for direct string attacks. Hold a chord in Strum or Arp mode for a repeating pattern. Dial in the pace, sweep, gate and swing.

03

Let it ring.

FREE gate lets notes decay naturally. Lock a chord with ENV, explore a new tuning, and keep the voicing you love on each slot. PLAY brings everything to a gentle stop.

GuitChordi browser instrument with chord suggestions, guitar controls and playable keys
THE ACTUAL BROWSER INSTRUMENTStep inside ↗

03 / A LITTLE HELP TO GET STARTED

Less manual.
More muscle memory.

Pick up the essentials in a few minutes. Keep the one-page control map beside your instrument.

The player’s guideSounds, chord slots, strumming and everyday controlsThe A4 cheat sheetA printable control map with button callouts · PDFBuilt on good companyOpen source, credits and complete source downloads
ON THE
REAL THING ↗

GUIT / CHORDI / BETA

Small machine.
Real strings attached.

The quiet beta has been played on an actual FM-1, with controls and audio confirmed by its maker. We’re still checking sustained load, every instrument and restoration before a public firmware release.

Browser saves persist in your browser. Device SAVE currently lasts for the powered session. Standard EADGBE is the default; alternative tunings are independent of your instrument and chord style.

Follow the beta on GitHub ↗Read the hardware notes
Public firmware download and installation will follow qualification. This page does not flash your device.

YOUR NEXT GOOD CHORD IS IN HERE SOMEWHERE.

Go on. Have a strum.

Play in browser