Knobula Pianophonic: MIDI CC, NRPN and OSC map¶
The Knobula Pianophonic as named OSC addresses — 13 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Knobula Pianophonic |
|---|---|
| Vendor | Knobula |
| OSC prefix | /pianophonic |
| Source | 📦 Derived from MIDI Guide (community CC/NRPN data) |
| Firmware | unknown |
| Revision | per pencilresearch canonical CSV |
| Upstream | pencilresearch |
| Data licence | CC-BY-SA-4.0 — MIDI Guide (https://midi.guide) by Pencil Research and contributors |
| Driver file | devices/knobula/pianophonic.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/knobula/pianophonic.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 pianophonic: ask “what can the Knobula Pianophonic do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (13)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/pianophonic/system/all_sounds_off |
120 | 0–0 | continuous | System | |
/pianophonic/system/main_volume |
7 | 0–127 | continuous | System | |
/pianophonic/voice/chord_select |
1 | 0–127 | continuous | Voice | |
/pianophonic/envelope/attack_offset |
73 | 0–127 | continuous | Envelope | |
/pianophonic/envelope/decay_offset |
75 | 0–127 | continuous | Envelope | |
/pianophonic/envelope/release_offset |
72 | 0–127 | continuous | Envelope | |
/pianophonic/filter/offset |
74 | 0–127 | continuous | Filter | |
/pianophonic/oscillator/detune_offset |
94 | 0–127 | continuous | Oscillator | |
/pianophonic/oscillator/start_position_offset |
78 | 0–127 | continuous | Oscillator | |
/pianophonic/oscillator/morph_speed_offset |
77 | 0–127 | continuous | Oscillator | |
/pianophonic/effects/reverb_send_scaling |
92 | 0–127 | continuous | Effects | |
/pianophonic/calibration/v_oct_slope |
23 | 0–127 | continuous | Calibration | |
/pianophonic/calibration/v_oct_offset |
24 | 0–127 | continuous | Calibration |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /pianophonic/note/on <note> <velocity>, /pianophonic/cc/<number> <value>, /pianophonic/pitchbend <0-16383>, /pianophonic/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.