KORG volca drum: MIDI CC, NRPN and OSC map¶
The KORG volca drum as named OSC addresses — 63 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | KORG volca drum |
|---|---|
| Vendor | KORG |
| OSC prefix | /volca_drum |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per pencilresearch canonical CSV |
| Upstream | electra-preset |
| Driver file | devices/korg/volca_drum.json |
Not tested on the device yet
This driver comes from documentation or community data and has not been checked on real hardware. If you own one, a quick test and a pull request promoting it helps everyone — see CONTRIBUTING.
How do you control it?¶
Find the MIDI ports, then start the bridge with this driver:
osc-bridge detect # prints the ready-to-run line for what is plugged in
osc-bridge run --device devices/korg/volca_drum.json --out-port <N> --in-port <M>
Then send OSC to 127.0.0.1:7777, for example:
From Claude or any MCP client, the osc-bridge mcp server exposes this driver as volca_drum: ask “what can the KORG volca drum do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (63)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/volca_drum/general/pan |
10 | 0–127 | continuous | General | |
/volca_drum/select/1 |
14 | 0–127 | continuous | Select | |
/volca_drum/select/2 |
15 | 0–127 | continuous | Select | |
/volca_drum/select/1_2 |
16 | 0–127 | continuous | Select | |
/volca_drum/level/1 |
17 | 0–127 | continuous | Level | |
/volca_drum/level/2 |
18 | 0–127 | continuous | Level | |
/volca_drum/level/1_2 |
19 | 0–127 | continuous | Level | |
/volca_drum/envelope_generator/eg_attack_1 |
20 | 0–127 | continuous | Envelope generator | |
/volca_drum/envelope_generator/eg_attack_2 |
21 | 0–127 | continuous | Envelope generator | |
/volca_drum/envelope_generator/eg_attack_1_2 |
22 | 0–127 | continuous | Envelope generator | |
/volca_drum/envelope_generator/eg_release_1 |
23 | 0–127 | continuous | Envelope generator | |
/volca_drum/envelope_generator/eg_release_2 |
24 | 0–127 | continuous | Envelope generator | |
/volca_drum/envelope_generator/eg_release_1_2 |
25 | 0–127 | continuous | Envelope generator | |
/volca_drum/pitch/1 |
26 | 0–127 | continuous | Pitch | |
/volca_drum/pitch/2 |
27 | 0–127 | continuous | Pitch | |
/volca_drum/pitch/1_2 |
28 | 0–127 | continuous | Pitch | |
/volca_drum/mod/amount_1 |
29 | 0–127 | continuous | Mod | |
/volca_drum/mod/amount_2 |
30 | 0–127 | continuous | Mod | |
/volca_drum/mod/amount_1_2 |
31 | 0–127 | continuous | Mod | |
/volca_drum/mod/rate_1 |
46 | 0–127 | continuous | Mod | |
/volca_drum/mod/rate_2 |
47 | 0–127 | continuous | Mod | |
/volca_drum/mod/rate_1_2 |
48 | 0–127 | continuous | Mod | |
/volca_drum/general/bit_reduction |
49 | 0–127 | continuous | General | |
/volca_drum/general/fold |
50 | 0–127 | continuous | General | |
/volca_drum/general/drive |
51 | 0–127 | continuous | General | |
/volca_drum/general/dry_gain |
52 | 0–127 | continuous | General | |
/volca_drum/general/send |
103 | 0–127 | continuous | General | |
/volca_drum/general/waveguide_model |
116 | 0–127 | continuous | General | |
/volca_drum/general/decay |
117 | 0–127 | continuous | General | |
/volca_drum/general/body |
118 | 0–127 | continuous | General | |
/volca_drum/general/tune |
119 | 0–127 | continuous | General | |
/volca_drum/pitch |
26 | 0–172 | continuous | ||
/volca_drum/eg_attack |
20 | 0–127 | continuous | ||
/volca_drum/eg_release |
23 | 0–127 | continuous | ||
/volca_drum/mod_amount |
29 | 0–127 | continuous | ||
/volca_drum/mod_rate |
46 | 0–127 | continuous | ||
/volca_drum/src_mod_eg |
14 | 0–127 | continuous | ||
/volca_drum/pitch |
27 | 0–127 | continuous | ||
/volca_drum/eg_attack |
21 | 0–127 | continuous | ||
/volca_drum/eg_release |
24 | 0–127 | continuous | ||
/volca_drum/mod_amount |
30 | 0–127 | continuous | ||
/volca_drum/mod_rate |
47 | 0–127 | continuous | ||
/volca_drum/src_mod_eg |
15 | 0–127 | continuous | ||
/volca_drum/pitch |
28 | 0–127 | continuous | ||
/volca_drum/eg_attack |
22 | 0–127 | continuous | ||
/volca_drum/eg_release |
25 | 0–127 | continuous | ||
/volca_drum/mod_amount |
31 | 0–127 | continuous | ||
/volca_drum/mod_rate |
48 | 0–127 | continuous | ||
/volca_drum/src_mod_eg |
16 | 0–127 | continuous | ||
/volca_drum/bit_reduction |
49 | 0–127 | continuous | ||
/volca_drum/fold |
50 | 0–127 | continuous | ||
/volca_drum/drive |
51 | 0–127 | continuous | ||
/volca_drum/pitch_quantize |
53 | 0–127 | continuous | ||
/volca_drum/send |
103 | 0–127 | continuous | ||
/volca_drum/model |
116 | 0–127 | continuous | ||
/volca_drum/level_1 |
17 | 0–127 | continuous | ||
/volca_drum/level_2 |
18 | 0–127 | continuous | ||
/volca_drum/level_1_2 |
19 | 0–127 | continuous | ||
/volca_drum/decay |
117 | 0–127 | continuous | ||
/volca_drum/body |
118 | 0–127 | continuous | ||
/volca_drum/tune |
119 | 0–127 | continuous | ||
/volca_drum/dry_gain |
52 | 0–127 | continuous | ||
/volca_drum/pan |
10 | 0–127 | continuous |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /volca_drum/note/on <note> <velocity>, /volca_drum/cc/<number> <value>, /volca_drum/pitchbend <0-16383>, /volca_drum/program_change <n>.
Limitations¶
CC/NRPN only. SysEx (preset management, display control, bulk dump/load, vendor-proprietary opcodes) is NOT covered by pencilresearch. To extend this device with SysEx, sniff the vendor editor, add `sysex.header/footer` + `commands` blocks, and use `update_device.md` PR template.