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GR!MM 1.0, the first public release: a dark ambient, dungeon synth and deathdream firmware for the M-VAVE FM-1.
Install: pick GR!MM on the FM-1 Firmware Hub in Chrome or Edge, or download
grimm.fwsc below and install it with py tools\fm1_install.py grimm.fwsc. Installing firmware is at your own risk;
the hub's Rescue page brings a stuck FM-1 back.
Try it first: the demo runs the same firmware in your browser. The
editor edits sounds live on the FM-1, loads samples and makes backups.
What's in it:
- Four tracks with six shared voices and seven sound sources: VA, 6-operator FM (fully editable on the FM-1), SAMPLE, VOICE, WHEEL, PHYS and PHASE
- 40 factory sounds and 64 slots for your own, with names
- Four factory samples (URCHIN, LEAVE, NIKOLAI, M-SOFT; CC0), written into empty sample slots at the first start. RESTORE FACTORY SAMPLES is on SYSTEM 2 and in the editor
- Effects: TAPE, GRAIN with FREEZE, DELAY, and SPACE (reverb up to ~32 s, and infinite)
- Per track: envelope, LFO, filter, scales, one-key chords, arpeggiator, latch
- A 64-step sequencer per track with chance, ratchets, note lengths, step locks and pattern tools
- Song mode, slots A–D, a performance layer (freeze, throws, tape stop, reverse, filter sweeps, stutter)
- MIDI in and out, MIDI learn, USB audio, autosave, the battery level on HOME
The manual explains every page and combo.
Package identity: FM-1_966. Your sounds, slots, settings and samples are kept when you update.
Free software under GPL-3.0; LICENSE, LICENSING.md and LICENSES.zip are attached. Built on Dinghy (zvenson),
Felucca (Leo Kuroshita, Hügelton Instruments) and SLOOP (isod89).