Les

FM-1 firmware · v0.4

fm1-nc-companion

A two-part sound module for the Novation Circuit Tracks: its two MIDI tracks play the FM-1's sounds, steered by the Circuit's macro knobs.

Made by
fenderberg
Released
October 24, 2026
Install
On GitHub
Scan
Scanned, nothing harmful found · Oct 31 What we checked
Last checked
October 31, 2026

What fm1-nc-companion does

  • Twelve engines cover FM6, JUNO, PHASE, TRIO, ACID, PHYS, GRAIN, VOICE, LOFI, WHEEL, NOISE and SAMPLE across 161 built-in sounds.
  • Part L plays the Circuit's first MIDI track and part R the second, leaving on the left and right outputs.
  • SELECT picks the sound type, ALGORITHM the engine and PRESETS the sound, so a pad stays a pad across engines.
  • The Circuit's eight macro knobs are mapped to matching parameters on every engine, and the FM-1 screen names each move.
  • The FM-1 has no sequencer of its own, but an arp locked to the Circuit's clock runs with HOLD on REC.
  • SEQ switches on Drone, stacking held notes or replacing the whole chord with each new strike.
  • FX adds sends, delay, reverb, chorus and insert effects, and the white keys fire PERFORM effects while FX is open.
  • Autosave keeps parts, sounds, effects and Dual choices, and a USB web page manages 32 user presets, DX7 banks and backups.

Its modes

SOUND
Pick each part's sound by type, engine and preset, and set level, octave, voice mode and glide.
ARP
Switch on the arp for the focused part and set mode, rate, octaves, gate, swing, probability, order and drone mode.
GLO
Set each part's MIDI channel, the output split or stereo, the clock source, Dual, internal tempo and Drone modes.
EDIT
Edit the focused sound's engine parameters, envelopes, LFO, voice, chord, filter and FM6 operators.
SENDS
Set drive and the chorus, delay and reverb sends of the part in focus.
DELAY
Set the synced delay time, feedback, colour and mix.
REVERB
Choose room, spring or hall and set size, damping and the part's reverb send.
CHORUS
Set chorus rate and depth plus the part's Juno chorus and drift.
INSERT
Choose an insert type such as fuzz, crush, phaser or flanger and dial its three controls.
PERFORM
See which white key fires which performance effect and set filter, crush, throw and depth.

What Les checked

fm1-nc-companion v0.4Scanned 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
  • A serial port, which many FM-1 firmwares keep for debugging. It can't type into your computer.

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.