Les

FM-1 firmware · 2026.10.27

Tonitor

Six tracks of evolving sound objects for acousmatic and live ambient music, with eight engines, free loopers, a granulator and reverb.

Made by
Nuno Zimas
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 Tonitor does

  • Each of the six tracks plays one of eight engines: FM, ANIMA, CALIGULA, RUSSOLO, DRUID, BAYAREA, HIVE and OBRADOR.
  • Every track has a free looper of up to ten overdubs, with no tempo or grid, so loops drift apart.
  • The white keys play the chosen track in one of 23 scales, and SHIFT latches held notes as drones.
  • Per track you get a filter, granulator, crush, distortion, level, pan and sends to a master delay and plate reverb.
  • BALLSY bounces balls off walls for notes, BRICKLAYER builds a step sequence, and PLAY ALONG has other tracks answer the one you play.
  • Sixty-four session slots in the FM-1's flash hold every track, sound, loop and setting, plus 16 snapshots with morphing.
  • MIDI arrives over USB and the TRS jack, and the FM-1 sends USB audio as a stereo master or six mono tracks.

Its modes

ENVELOPE
Set the chosen track's attack, decay, sustain and release on KNOB 1 to 4.
SCALE
Pick the root with SELECT and the scale with ALGORITHM for every track.
PRESETS
Save the track's current sound into one of the engine's 64 slots, or load one back.
SNAPSHOTS
Store and recall 16 whole states of the machine on the white keys, with a morph time on KNOB 1.
SESSIONS
Choose one of 64 slots in the flash to load, or start a blank session there.
GLOBAL SETUP
Set the MIDI channels, ports, note and CC sending, and what the USB audio sends.
MOD
Set each track's two LFOs and four modulation slots, their sources, destinations and amounts.
PLAY ALONG
Choose REACT, SHADOW or ARPEGGIO, take tracks in to follow the guide, and shape them with the knobs.
BALLSY
Run a sequencer of bouncing balls that play notes of the scale as they hit the walls.
BRICKLAYER
Build a step sequence a note at a time on the white keys and set its length, rate, harmony and variation.

What Les checked

Tonitor 2026.10.31Scanned October 31, 2026

What we checked for

  • The file matches the checksum the FM-1 Firmware Hub records for this version
  • 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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