Les

FM-1 firmware · 0.1-beta

Ketch

A four-channel tracker in the LSDJ mould: song, chain and phrase screens, instruments, per-row commands, effects and a mixer on the FM-1's keys.

Made by
risseraka
Released
October 12, 2026
Install
On the FM-1 Firmware Hub · source on GitHub
Scan
Scanned, nothing harmful found · Oct 31 What we checked
Last checked
October 31, 2026

What Ketch does

  • Ketch turns the FM-1 into a four channel tracker in the LSDJ, picoTracker and M8 line.
  • Each channel plays one of Felucca's sound engines, including FM, physical models, drums and grains.
  • Songs are built as song, chain and phrase, with sixteen rows of note, instrument, velocity and commands.
  • Row commands cover delay, retrigger, ramps, chance, hops, swing and every sound parameter of the instrument.
  • The keybed becomes a gamepad: a d-pad on the lowest keys plus SHIFT, PLAY, OPTION and EDIT.
  • Press REC to play notes on the middle keys, then record live with count-in and metronome or enter steps.
  • A mixer gives level, mute and solo per channel, with delay, reverb and chorus shared across all four.
  • Projects save into the FM-1's flash with SAVE, and USB-MIDI and USB audio let you record the output.

Its modes

Song
Lay out one column per channel and a chain number per row, playing down the rows.
Chain
Line up to sixteen phrases in a row, each with its own transpose.
Phrase
Write sixteen rows of note, instrument, velocity and commands like delay, retrigger, chance, swing and ramps.
Instrument
Pick the engine and preset, set level, pan and name, and assign the four knob slots.
Event view
See every row an instrument plays across the song and edit it everywhere at once.
Envelope
Shape attack, decay, sustain and release, and choose what the envelope modulates.
LFO
Set rate, wave, phase and fade, and choose what the LFO modulates.
Voice
Switch between poly and mono, set glide and detune, and send the voice to the effects.
Project
Load and manage project slots in flash and set tempo, step, swing, tune, metronome and count-in.
Effects
Dial in the delay, reverb and chorus shared by the four channels.

What Les checked

Ketch v0.1-betaScanned 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

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