Eventide H9: MIDI CC, NRPN and OSC map¶
The Eventide H9 as named OSC addresses — 17 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Eventide H9 |
|---|---|
| Vendor | Eventide |
| OSC prefix | /h9 |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per Electra preset |
| Upstream | electra-preset |
| Driver file | devices/eventide/h9.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/eventide/h9.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 h9: ask “what can the Eventide H9 do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (17)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/h9/mix_20 |
20 | 0–100 | continuous | ||
/h9/21 |
21 | 0–100 | continuous | ||
/h9/22 |
22 | 0–100 | continuous | ||
/h9/23 |
23 | 0–100 | continuous | ||
/h9/r_24 |
24 | 0–100 | continuous | ||
/h9/l_25 |
25 | 0–100 | continuous | ||
/h9/input_1 |
1 | 0–100 | continuous | ||
/h9/26 |
26 | 0–100 | continuous | ||
/h9/27 |
27 | 0–100 | continuous | ||
/h9/28 |
28 | 0–100 | continuous | ||
/h9/29 |
29 | 0–100 | continuous | ||
/h9/record |
30 | 0–127 | continuous | ||
/h9/play |
31 | 0–127 | continuous | ||
/h9/stop |
32 | 0–127 | continuous | ||
/h9/clear |
33 | 0–127 | continuous | ||
/h9/direction_34 |
34 | 0–127 | continuous | ||
/h9/octave_35 |
35 | 0–127 | continuous |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /h9/note/on <note> <velocity>, /h9/cc/<number> <value>, /h9/pitchbend <0-16383>, /h9/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.