devices/kawai/k4r.electra-newignis-v6.fw-unknown.jsonEdit on GitHubJSONKawai K4r (per Electra preset) MIDI CC chart, NRPN and OSC map
The Kawai K4r MIDI implementation: 2 CC, each named, for Claude (MCP), SuperCollider or any OSC app.
- sourceElectra One preset
- real unitnot yet checked
Not checked on a real Kawai K4r yet. Own one? Load a sound or send a control, and tell us whether it worked.
- Maker
- Kawai
- Version
- per Electra preset
- Source
- Electra One preset
- OSC prefix
/k4r
Use 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/kawai/k4r.electra-newignis-v6.fw-unknown.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 k4r: ask “what can the Kawai K4r do?” and it reads this map with list_routes. See the MCP guide.
MIDI controls
2 controls, each with its number, its range and the name to send
| Control | CC | Range | Name to send |
|---|---|---|---|
| All notes off | 123 | 0–127 | /k4r/all_notes_off |
| Modwheel | 1 | 0–127 | /k4r/modwheel |
Performance MIDI
Notes, pitch bend and any CC are also available: /k4r/note/on <note> <velocity>, /k4r/cc/<number> <value>, /k4r/pitchbend <0-16383>, /k4r/program_change <n>.
Limitations
Imported from an Electra One community preset. The mapping reflects the preset author's editorial choices: parameter naming, ranges, and which params are exposed. Untested on hardware in this repo.
Other versions
The Kawai K4r is mapped in 2 versions. per Electra preset.
Frequently asked questions
How many parameters of the Kawai K4r can be controlled over MIDI?
SynthHub's map of the Kawai K4r lists 2 MIDI CC parameters, each with its number, range and a readable name; the full chart is on this page.
Can an AI agent like Claude control the Kawai K4r?
Yes: SynthHub's hosted MCP server knows the Kawai K4r's MIDI map, and its browser relay lets the agent send it parameter changes or load a sound, each sound change confirmed by you.