Prysm 1.0

Prysm 1.0: an instant drone, a morphing LFO, and a self-oscillating filter that starts from silence.

Install: the web installer (Chrome or Edge), or python3 tools/fm1_install.py prysm-1.0.fwsc. Manual: docs/MANUAL.md. Your saved sounds and patterns carry over. New in 0.9 (chords and live recording in the sequencer, the envelope pages and more): the 0.9 notes.

New

• VCA OPEN, an instant drone (AMP page, the new VCA row): it holds the amp open, like a VCA bias on an analog synth. Notes you let go keep sounding at that level, each voice on its last note, so a chord becomes a drone chord. With nothing played yet, it drones C3. Keys play over it; turn OPEN back to 0 and it fades out.
• LFOSHAPE, a new destination for the mod envelopes and LFO 2: it morphs the LFO's wave smoothly through sine, triangle, saw up, saw down, square and S&H. For example, a vibrato that turns from smooth to stepped as a note goes on.

Fixed

• Self-oscillation now starts from silence: with both oscillators at 0, the filter at the top of RES still sings, at every cutoff (in 0.9 it needed some sound in it first).
• The manual's self-oscillation tuning was wrong: with KEY at 127, a CUT of about 47 puts each key near its own note. (0.9's manual said 64.)

Changed

• Patch format 11. Patches, patch files and plugin projects from 0.9 and older convert by themselves. The editor and the CLAP plugin stay in step with an FM-1 running 1.0.
• From 1.0 on, every Prysm release keeps the package identity FM-1_989; the version (1.0) tells releases apart.

From ETCH: restore the official firmware first. If an FM-1 does not start after an update, hold OCT- while switching it on (the rescue updater). Community firmware, not made or supported by M-VAVE: install at your own risk. GPL-3.0.