Les

FM-1 firmware · 0.9.1

DRIFT

An ambient synth with one generative Euclidean sequencer track: warm basses, pads and plucks on eight voices, with delays and reverbs.

Made by
Fabian Freitag (FBNFRTG)
Released
October 25, 2026
Built on
Felucca
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 DRIFT does

  • DRIFT is an ambient instrument with two oscillators, eight voices and classic synth sounds, warm basses, pads and plucks.
  • A repeating generative Euclidean sequencer sets bars, note count, duration and probability, and the loop plays back identically each lap.
  • Direction, interval, chaos and timing variation reshape the melody in the chosen scale while the playhead keeps running.
  • Delay offers Classic, Ping Pong and Reverse up to four bars, and reverb offers Room, Spring, Hall, Space, Shimmer and Submarine.
  • You play the live keyboard with OCT\u2212 and OCT+ shifting three octaves either way, and PLAY starts and stops the loop.
  • A resonant filter, ADSR envelope and assignable LFO shape every patch, with root, scale and note range saved alongside.
  • Stop playback and press SAVE to name a patch of up to twelve characters in one of 32 user slots.
  • Three sample slots hold about 7.38 seconds each, loaded over USB-MIDI, and incoming MIDI follows the scale setting.

Its modes

HOME
Pick a sound from the six-row patch list, mark favourites with REC, and press HOME again to delete a patch.
GLO 1 / 2
Set oscillator 1 wave, detune, mix and level, and oscillator 2 wave, tune and level, including the three sample slots.
EDIT
Shape the filter cutoff, resonance, envelope amount and drive.
ENV
Set Attack, Decay, Sustain and Release with an envelope graph.
LFO
Set rate, filter depth, target and target depth for volume, delay send, oscillator 2 pitch or detune.
SELECT
Set the tempo between 40 and 240 BPM.
ARP
Set the loop length in bars, the note count, note duration and the proportion of enabled events.
SEQ
Shape the melody with direction, interval, chaos and timing variation while watching the piano roll.
SCL 1 / 2
Choose root, scale and note range, then turn on scale LEDs and scale-only keyboard.
FX 1 / 2 / 3
Dial in delay, reverb and the chorus, damp, motion and level page.

What Les checked

DRIFT v0.9.1Scanned 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
  • 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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