Les

FM-1 firmware · v0.1

fm1-trio

A jazz trio that follows your chords: you play the changes, and a walking bass and a swinging drummer play along.

Made by
Reytian
Released
October 19, 2026
Install
On GitHub
Scan
Scanned, nothing harmful found · Oct 31 What we checked
Last checked
October 31, 2026

What fm1-trio does

  • You play jazz chords and a walking bass and a drummer, both neural networks on the FM-1, play along.
  • Once your chords come round again, TRIO learns the tune's form and keeps going round it when you stop playing.
  • K1 sets the tempo, K2 the bass's freedom, K3 how much the drummer plays, and K4 the swing.
  • ARP picks the feel: AUTO starts in two then walks in four, or stay in TWO or FOUR.
  • Press EDIT and walk a line yourself, and the bass learns to walk more the way you do.
  • REC starts a new tune, and holding EDIT returns the bass to how it was trained.
  • SAVE keeps the tempo, mix, feel, octave and what the bass learned for the next start.
  • MIDI arrives over USB, the TRS jack and Bluetooth, and the USB cable also records the trio as a sound card.

Its modes

Band page
Play chords and watch the current chord, the next one, the form and the bass note while the trio plays.
Mix page
Set the piano, bass and drum volumes, the room, and turn TRIO's piano sound on or off.
Bluetooth page
Find and connect a Bluetooth MIDI keyboard or piano, or switch Bluetooth on and off.

What Les checked

fm1-trio v0.1Scanned October 31, 2026

What we checked for

  • The file is exactly the one its author published
  • It's the same file we saw when this release first came out
  • It opens cleanly as an FM-1 firmware, nothing damaged
  • It doesn't show up on your computer as a keyboard, mouse or other input device
  • It doesn't show up as a USB drive or network adapter
  • Its text mentions no computer command tools, like PowerShell, Terminal or a download command

What we found

  • MIDI and audio, as expected

StatusScanned, nothing harmful found

Les scans every firmware here whose file is public, and shows what it checked and what it found. A scan lowers the risk; it can't rule it out. This firmware is made by its author, not by Les or M-VAVE. Back up first, and install at your own risk. How Les scans firmware

Invite-only for now

Ask Les about your own setup

Say what you want to make and what else you use. Les gives you steps for your own gear, one at a time, and says why each one works.

To get an invite: leave your email, then join the Les Discord.

Gear named here gets added to Les first.

We'll email your invite, plus an occasional note on what's new in Les. Unsubscribe anytime. Privacy

Les is independent and not affiliated with M-VAVE or the firmware authors. M-VAVE and FM-1 are trademarks of their owners.