SLOOP
Live-performance groovebox built on Felucca: 4 tracks, 12 engines including 6-op FM with DX7 import, drum machine, 27 punch-in effects, user samples, song mode, USB audio, web editor.
by isod89
Brick risk. Flashing this carries a known, documented risk of damaging the device.
- Distribution
- Browser installer (WebMIDI / WebUSB)
- License notes
- Code is GPL-3.0-only; icon atlas and panel image are separate assets (LICENSING.md). Includes msfa (Apache-2.0) for the FM6 engine.
- Source
- github.com https://github.com/isod89/sloop-fm1
- Homepage
- isod89.github.io https://isod89.github.io/sloop-fm1/
- sequencer
- synth-engine
- drums
- sampler
- fx
- performance
- usb-audio
- midi
- fm
- physical-modeling
- editor
Description
Projects, patterns and songs without mandatory presets. Three synth tracks plus a drum track, TRS MIDI in, MIDI clock sync, physical models of strings and bells, sample chopping, and a web editor with backup and restore. Several forks build on it (sloopDX, zp12, ORBIT, FM1 Move, FM1 Quest, Optimist and the SMK-37 Snoop37 port).
Install notes
Web installer in Chrome or Edge over USB. Roll back to M-VAVE stock V15 with M-UPGRADE or the installer. If SLOOP or a derivative will not start, hold OCT- alone while powering on to enter USB rescue (per fm1-editor.com).
Version history
| Version | Date | Notes |
|---|---|---|
| 2.6 | 2026-10-11 | Sustain pedal and pitch bend over MIDI. |
| 2.5 | 2026-10-09 | |
| 2.4.1 | 2026-10-07 |