Sloop

isod89v2.6Updated Oct 12, 2026453 on GitHub

Alt Firmware
firmware

Sloop is free, open-source alternate firmware for the M-VAVE FM-1, based on Felucca. It turns the instrument into a four-track groovebox with three synth tracks and a 16-sound drum machine. Nine synthesis engines cover analog, four-operator FM, phase distortion, three-oscillator synthesis, tonewheel organ, formant voice, granular synthesis, lo-fi chip sounds and sampling. Designed for live performance, it combines loop recording and overdubbing with step sequencing, per-step levels and ratchets, swing, polymeters, one-key chords and 16 punch-in effects. Sections A–D can be performed live and recorded into a song. A browser-based editor provides parameter control, a drum grid, preset management and sample upload; firmware installation is also available through the browser over USB.

License: GPL-3.0-only

Compatible with

FM-1M-VAVE

Links

Source Install in browser

Installing third-party firmware can brick your unit and may void its warranty. Back up first and follow the project's instructions.

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