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Firmware

Carnac OS

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Alternative operating firmware for the FM-1.

forM-VAVE FM-1·by@OwenKirby

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Download v0.9.6

carnac-0.9.6.fwsc· 595 KB· +1 file

GPL-3.0· OwenKirby/carnac-os·downloads come from the creator’s GitHub releases

29 commits and 4 releases in the last year

Carnac OS

A polyphonic synthesizer firmware for the M-VAVE FM-1, by OrbVorgis.

Carnac OS replaces the FM-1's firmware with a wavetable synth themed on Carnac's standing stones and the Neolithic: 15 morphing wavetable banks, seven voice architectures (including STRIKE, with 20 synthesised Neolithic attack sounds), four filter types, three modulation slots per patch, spring, tomb and tank reverbs, tape and bucket-brigade delays, a step sequencer with scales, an arpeggiator, two layers with splits and zones, and presets saved in the instrument's flash. It runs on both of the FM-1's cores.

Carnac OS is in beta (0.9.x). Installing custom firmware is at your own risk. M-VAVE's own firmware can always be put back (see Recovery below).

Install

The easy way: open the web installer in Chrome or Edge, with the FM-1 connected by USB.

Carnac OS is free. If you enjoy it, you can tip me on Ko-fi.

From the command line: download the .fwsc package from Releases, plug in the FM-1 over USB, then:

python x0x-firmware/tools/fm1_install.py carnac-0.9.0.fwsc
python src/hardware/pcm_store_upload.py sync

The .fwsc holds the firmware only. The PCM waves (CHOIR, MOONSONG, PAN FLUTE...) and the Foundations wavetable bank live in their own flash areas and are uploaded by the second command, from a checkout of this repo at the same release tag (git checkout v0.9.0; it needs pip install mido python-rtmidi). The web installer does both steps for you. If you install the .fwsc with any other tool, the FM-1 starts with an empty field and no standing stones on its start-up screen, and the words WAVES MISSING (or WAVES OUT OF DATE): run the web installer or the sync command once to fix it. Until then Foundations plays a sine and the PCM waves are silent.

Saved presets live in their own flash area, so they survive firmware updates.

Recovery

  • A build that crashes twice in a row at start-up boots into safe mode, with USB up, so you can install again.
  • To put M-VAVE's stock firmware back on a unit that doesn't answer USB, see docs/fm1-recovery.md (hold OCT- and OCT+ together for 5 s to enter the chip's update mode).

Build from source

git clone --recursive https://github.com/<you>/carnac-os.git
  • Host tests (gcc and Python with Pillow): sh src/host/run_tests.sh
  • Firmware (Linux / WSL, with the JieLi toolchain and AC79 SDK described in x0x-firmware/BUILDING.md; X0X's tree needs LF line endings): python3 src/hardware/build_fm1.py --x0x x0x-firmware --release 0.9.0
  • Browser emulator (Emscripten): sh web/emu/build.sh
  • Website with the web installer (GitHub Pages): python3 web/site/make_site.py PACKAGE VERSION build/site, tested with python3 web/site/test_installer.py build/site (headless Edge or Chrome, simulated FM-1); sh web/site/publish_site.sh VERSION pushes it to the gh-pages branch

The x0x-firmware submodule is pinned to the exact X0X commit the release was built with.

Licence

GPL-3.0-only. See LICENSE, and LICENSING.md for where each part comes from and the credits to X0X and Felucca, on whose platform Carnac runs.

Carnac OS is independent firmware, not affiliated with or endorsed by M-VAVE.