DRIFT
Version 0.9.1 fixes the Delay Time bar ordering and restores narrower webplayer keys with both rows contained inside the keybed. Audio and patch storage are unchanged from 0.9.
An ambient instrument for M-VAVE FM-1. Classic synth sounds, warm basses, pads and plucks, with a repeating generative Euclidean sequencer. Minimal monochrome interface, one sequencer track and eight voices.
By Fabian Freitag. Based on Felucca by Leo Kuroshita / Hügelton Instruments.
Project website · Play in your browser · Install firmware · Manual · Releases
Features
- Two oscillators; oscillator 2 starts with OFF. Classic waveforms and three user sample slots.
- ADSR envelope, resonant filter, assignable LFO and 80 BPM default tempo.
- Classic, Ping Pong and Reverse delay; Room, Spring, Hall, Space, Shimmer and Submarine reverb.
- Repeating Euclidean patterns: bars, note count, duration and probability; direction, interval, chaos and timing variations. Editing keeps the transport running.
- Root, scale and note range; optional scale LEDs and scale-only keyboard.
- Six-row patch list, favourites, save under a new name, overwrite confirmation and delete confirmation.
- Browser player, USB-MIDI firmware installer and sample uploader.
Controls
| Control | Function |
|---|---|
| HOME / PATCHES | Patch list / select patch; HOME again opens delete confirmation |
| REC / SAVE | Favourite / save patch |
| GLO | Oscillator 1 / oscillator 2 |
| ENV / EDIT / LFO | ADSR / filter / modulation |
| FX | Delay / Reverb / Misc |
| SCL | Root, scale and range / scale LEDs and scale-only mode |
| ARP / SEQ | Sequence 1 / sequence 2 |
| SELECT / ALGORITHM | Tempo / low-pass filter |
| PLAY / OCT− / OCT+ | Transport / live keyboard octave |
See the English manual or detailed German notes.
Install and release status
Release 0.9.1, identity FM-1_983, update loader ota-FM-1_983. This identity stays fixed across versions.
Use the .fwsc attached to a GitHub release, or the website installer in desktop Chrome or Edge over HTTPS. Keep power and USB connected during installation.
Software build, native synthesis/persistence, WebAssembly and simulated update/loader checks passed for the supplied 0.9.1 binary. Physical installation, outgoing updates and recovery for this exact release still require verification on a real FM-1 before Firmware Hub submission. Earlier user-tested builds do not replace testing this package.
The 0.9.1 update retains the DRIFT 0.8 patch/sample storage layout. New CHAOS values use spare bytes; older firmware cannot reproduce all new settings. Nonzero CHAOS patterns and FX colour can change after this update. Other firmwares' projects and samples are not guaranteed compatible. Back up your data before updating or switching firmware.
Samples
Three slots, each up to approximately 7.38 seconds, mono, 22,050 Hz; stored as 4-bit IMA ADPCM. The sample uploader converts supported audio locally. Stereo is downmixed.
Build and contribute
Build instructions · Changes · Contributing · Publishing instructions
All engine sources are included directly. Internal felucca filenames and symbols are retained where they are build dependencies; they are not a separate product download.
Licence and credits
DRIFT is distributed under GPL-3.0-only, with the third-party licences and notices documented in LICENSING.md, CREDITS.md, LICENSE and LICENSES/. Preserve these notices when redistributing.
Independent firmware; not affiliated with M-VAVE. Impressum / Legal notice.
0.9.1 — Sequence variations and reorganised effects
- DIR: ROOT plus nine movement families with seven ranges each (UP, DN, UD, DU, BOUNCE, OUT, IN, PEDAL, WALK). Old direction values retain their meaning.
- INTERVAL: fixed scale intervals plus 3rd/4th, 3rd/5th, 4th/5th, 2nd/3rd, TRIAD (stacked thirds with octave return), 5th/4th, octave/3rd and 3rd/4th/5th. These are melodic steps in the selected scale, not simultaneous chords. New sequences wrap within the selected note range.
- CHAOS: 0 keeps the ordered pattern; 1–999 select independently seeded permutations. The number selects a variation, not an intensity. Identical pitches cannot become different through shuffling alone.
- FX 1 DELAY: Delay %, Time, Feedback, Type.
- FX 2 REVERB: Reverb %, Size, Type, Tone.
- FX 3 MISC: Chorus, Damp, Motion, Level.
- Delay Time is ordered from short to long, with straight, dotted and triplet values up to 4 bars. Durations are now realised rather than clipped to the buffer. Long delays reduce the delay-line sample rate and therefore sound darker. At 40 BPM, 4 bars = 24 seconds per delay interval / reverse segment.
- Tone now shapes the reverb input; Damp controls the reverb tail. The former stored delay Tone value becomes Reverb Tone. Delay feedback colour is fixed at its former default.
- Patch and sample addresses and 192-byte patch record size are unchanged. CHAOS values above 127 use previously unused record bytes. Old patches load, but nonzero Chaos patterns and FX colour can sound different. Downgrading cannot reproduce the new options.
- FM-1 identity stays FM-1_983; firmware, WASM and installer version 0.9.1.