Ableton Compressor2: MIDI CC, NRPN and OSC map¶
The Ableton Compressor2 as named OSC addresses — 23 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Ableton Compressor2 |
|---|---|
| Vendor | Ableton |
| OSC prefix | /compressor2 |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per Electra preset |
| Upstream | electra-preset |
| Driver file | devices/ableton/compressor2.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/ableton/compressor2.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 compressor2: ask “what can the Ableton Compressor2 do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (23)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/compressor2/ratio |
5 / 37 | 0–16383 | continuous | ||
/compressor2/threshold |
12 / 44 | 0–16383 | continuous | ||
/compressor2/output_gain |
4 / 36 | -360–360 | continuous | ||
/compressor2/makeup |
17 | 0–127 | continuous | ||
/compressor2/model |
18 | 0–127 | continuous | ||
/compressor2/dry_wet |
1 / 33 | 0–1000 | continuous | ||
/compressor2/attack |
0 / 32 | 0–16383 | continuous | ||
/compressor2/release |
6 / 38 | 0–16383 | continuous | ||
/compressor2/auto_release |
13 | 0–127 | continuous | ||
/compressor2/knee |
3 / 35 | 0–16383 | continuous | ||
/compressor2/lookahead |
16 | 0–127 | continuous | ||
/compressor2/env_mode |
15 | 0–127 | continuous | ||
/compressor2/sidechain |
22 | 0–127 | continuous | ||
/compressor2/listen |
21 | 0–127 | continuous | ||
/compressor2/gain |
10 / 42 | 0–16383 | continuous | ||
/compressor2/mix |
11 / 43 | 0–1000 | continuous | ||
/compressor2/filter |
19 | 0–127 | continuous | ||
/compressor2/type |
20 | 0–127 | continuous | ||
/compressor2/frequency |
7 / 39 | 0–16383 | continuous | ||
/compressor2/gain |
8 / 40 | -150–150 | continuous | ||
/compressor2/device_on |
14 | 0–127 | continuous | ||
/compressor2/exp_ratio |
2 / 34 | 0–16383 | continuous | ||
/compressor2/eq_q |
9 / 41 | 1–120 | continuous |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /compressor2/note/on <note> <velocity>, /compressor2/cc/<number> <value>, /compressor2/pitchbend <0-16383>, /compressor2/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.