Les

FM-1 firmware · 1.3

Clipper

A deep polyphonic synth with 23 engines and 407 sounds, from a three-oscillator hybrid voice to six-operator FM, wavetables and physical models.

Made by
isod89
Released
October 30, 2026
Built on
SLOOP
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 Clipper does

  • Twenty-three engines and 407 sounds play one instrument, led by HYBRID: three oscillators, two filters, a sixteen-slot matrix.
  • Other engines cover FM, wavetables, wave sequencing, vector, Juno, analog, acid, strings, physical models, granular and formant voices.
  • A step sequencer holds sixteen steps with chords, ratchets, nudges and recording, beside an arpeggiator with fifteen modes.
  • Play eight voices in POLY, MONO, LEGATO, UNISON, LAYER, SPLIT or MULTI with two parts on two channels.
  • Effects run distortion, chorus, a tempo-synced delay, four reverbs, a DJ filter, master EQ, bus compressor and limiter.
  • Save sounds as user presets, and work with UNDO, COMPARE, MORPH, favourites and a randomizer on the FM-1.
  • Set the reference A4 between 400 and 480 Hz, pick historical or maqam scales, and load Scala files.
  • Connect over USB and TRS MIDI, play MPE controllers, and use the FM-1 as a USB audio interface.

Its modes

HOME
See the sound's name, family, engine and scope, and play its four main controls on the knobs.
PRESETS
Step through every sound, factory and user, one by one.
FX pages
Set the sends, the sound's filter and model, INSERT, delay, reverb, chorus and EQ+COMP.
GLO pages
Set tempo, swing, metronome, fine tune, master, tuning, system readouts and the MIDI settings.
ALGORITHM
Jump to the next family of sounds: PAD, BASS, LEAD, PLCK, KEYS, STAB, FX.
FX, SAVE
Tap to open their pages, and keep playing the keys while one is held.
SEQ, SEL, EDIT, ARP, GLO
Hold these for the sequencer layers: steps on the keys, key and chords, erase, note repeat and fills.
NOTES
Edit the pattern as a piano roll, setting each note's pitch, length and force.
REC
Record what you play into the pattern, and hold it to clear the pattern.
MIDI
Choose the input channel, output channel, bend range, local control, program changes, knob sending and breath control.

What Les checked

Clipper v1.3Scanned 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

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