Korg Volca FM firmware 1.08 unofficial update

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Checking out the new firmware from Pajen who has hacked the Korg Volca FM and fixed a bunch of stuff that Korg wouldn’t.

Check out Pajen’s original Reddit post here:
https://www.reddit.com/r/volcas/comments/dj7f7v/volca_fm_firmware_108_unofficial_velocity_on_note/

Here are the features:

  • Global setting 9 : enable/disable velocity on MIDI notes IN
  • Global setting 10: Yamaha compatability/Korg proprietary single patch import/export
  • Global setting 11: Patch change notes on/off

New MIDI CCs:

  • CC 1 : (Mod wheel) assignable via CC 91, defaults to Pitch Mod Depth
  • CC 85: Chorus on/off. value -64 off, value +64 on.
  • CC 86: Chorus stereo width, 64 is default
  • CC 87: Chorus speed, 64 is default
  • CC 88: Load patch, value 0-4: patch 1, 5-8: patch 2 etc up to 127
  • CC 89: Load pattern, value 0-8: pattern 1, 9-16: pattern 2 etc up to 127
  • CC 90: Tempo divisor, value 0-31: 1/1, 32-63: 1/2, 64-95: 1/4, 96-127: 1/8 (!)
  • CC 91: Mod wheel mapping: decides what MIDI CC mod wheel should map to. Example: value 42 sent on CC 91 – Mod wheel now controls Modulator Attack

LFO fixes:

  • S&H 256x scale error
  • S&H update logic error
  • LFO sign error (saw up/down, square polarity)
  • added filtering to remove digital pop on discontinuous LFO

Update: the original file has been taken down. You can grab it here.