zvenson / obervave

# OberVave
**One 8-voice analog-style polysynth for the M-VAVE FM-1, with chorus, delay and a plate reverb.**
OberVave turns the FM-1 into a single, deep instrument in the spirit of the classic American 8-voice poly synths of
1979-84: two oscillators a voice with hard sync and cross-modulation, a 12 / 24 dB filter with an SEM-style
lowpass-to-highpass morph, two envelopes, an LFO, an arpeggiator, a two-track step sequencer, 99 programs (64 factory sounds), and
three effects after the voices. No second engine: one synth, as far as the chip goes.
> **Status: 1.5.3, runs on the FM-1.** Install it from thefirmwarehub.com or with
> `tools/fm1_install.py docs/firmware/obervave-1.5.3.fwsc` (identity `FM-1_955`). 1.5.3: the update loader shows what it
> does (UPDATE MODE with a running light while it waits, WRITING with 20 segments and the percent, UPDATE FAILED), in the
> Firmware Hub's look; the idea from Skiff. 1.5.2 opened the FM-1's **TRS MIDI IN**
> jack: a keyboard, a drum machine or a sequencer through a TRS-to-DIN adapter plays OberVave (notes, CC, program
> change, clock, start / stop; if nothing plays, try the other adapter type, A or B). Before, only USB-MIDI reached it.
> The keys now send their notes on the MIDI channel set on the GLOBAL page (they always went out on channel 1).
> 1.5 has 99 program slots: 64 factory
> sounds (32 new ones on 33-64: arpeggios, brass, pads, keys, basses, leads, effects), 65-99 start as INIT. SAVE now
> saves anywhere: tap SAVE, turn PRESETS to the slot (the header shows its number and what is there), tap SAVE again.
> The programs saved with 1.4 come along on the first start.
> 1.4.3 gave each sound its own HOLD:
> the arp of track A and of track B latch on their own (one's HOLD held the other's notes, one's HOLD off stopped both).
> 1.4.2 kept the notes in time while
> the screen redraws (they stumbled under CC streams and live tweaking; chords on the SMK-37 came in staggered).
> 1.4.1 gave each sound its own
> arpeggiator (in 1.4 track B's sound did not arpeggiate). 1.4 gave track B a sound of its own
> (two sounds on the eight voices, see the sequencer) and opens the sequencer on TRACKS, A and B one
> under the other as in SLOOP. 1.3.1 coloured the sequencer by track (A blue, B orange). 1.3 gave the sequencer the whole
> screen and works it as SLOOP's step page (KNOB 1 moves the step cursor, the keys write into it), and switches and
> saves patterns as zp12 does its loops (see the sequencer). Do not install 1.1: its USB-MIDI out is
> broken, and once it runs no installer gets another firmware back on (1.2 fixed it).
**Play it in your browser:** `docs/sim/` is the firmware itself (the same C sources, compiled to WebAssembly) with
the FM-1's screen, keys, buttons and knobs, your computer keyboard or a MIDI keyboard. Build it with
`sh web/sim/build.sh`, try it with `python3 -m http.server -d docs/sim` (see `web/sim/build.sh` for the two tools).
**M-Vave SMK-37:** see SMK-37 instructions.
Hear it: the video is