vdcf (hj firmware)
Firmware for volca drum (Korg)
Unofficial firmware based on Korg 1.14 that adds a per-part filter and clipper, trig conditions, extended slices and negative accents for ghost notes, per-part sequence speed, touch FX and extra MIDI CCs.
by hj-oja
- Distribution
- Prebuilt image you flash yourself
- Requires stock
- 1.14
- License notes
- No license file in the repository. Distributed as a compiled WAV.
- Source
- github.com https://github.com/hj-oja/vdcf
- Homepage
- sonicstate.com https://sonicstate.com/news/2026/08/20/free-custom-firmware-for-the-volca-drum/
- sequencer
- filter
- fx
- midi
- performance
Description
Adds a bipolar low-pass and high-pass filter on every part, selectable soft or hard clipping, Elektron-style trigger conditions, sub-step SLICE patterns and corrected positive slices, ACCENT down to -15, negative swing, per-part motion interpolation, wrap and speed settings, momentary touch FX, and fixes for several clock and slice bugs in Korg 1.14. Installed as an audio file through SYNC IN like Korg's own updates. The author removed Korg's version-downgrade check so the official 1.14 file can be played to go back, but 1.14 does not understand negative SLICE or ACCENT values stored in programs.
Install notes
Hold FUNC and REC while powering on, then play Volca_Drum_0121.wav into SYNC IN with all audio processing disabled. A failed transfer leaves the existing firmware intact, according to the README. Hold PLAY while powering on to check the version.
Version history
| Version | Date | Notes |
|---|---|---|
| 1.21 | 2026-09-11 | Date is the last commit touching the firmware file; the "v1.21 update" commit is 2026-09-10. |