Written from
devices/elektron/octatrack.electra-matteo-select-col.fw-unknown.jsonEdit on GitHubJSONElektron Octatrack (per Electra preset) MIDI CC chart, NRPN and OSC map
The Elektron Octatrack MIDI implementation: 187 CC, each named, for Claude (MCP), SuperCollider or any OSC app.
- sourceElectra One preset
- real unitnot yet checked
Not checked on a real Elektron Octatrack yet. Own one? Load a sound or send a control, and tell us whether it worked.
- Maker
- Elektron
- Version
- per Electra preset
- Source
- Electra One preset
- OSC prefix
/octatrack
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/elektron/octatrack.electra-matteo-select-col.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 octatrack: ask “what can the Elektron Octatrack do?” and it reads this map with list_routes. See the MCP guide.
MIDI controls
187 controls, each with its number, its range and the name to send
| Control | CC | Range | Name to send |
|---|---|---|---|
| Atk | 22 | 0–127 | /octatrack/atk |
| Spd1 step | 28 | 0–127 | /octatrack/spd1_step |
| Spd2 step | 29 | 0–127 | /octatrack/spd2_step |
| Spd3 step | 30 | 0–127 | /octatrack/spd3_step |
| Amp vol | 25 | -64–63 | /octatrack/amp_vol |
| Rel | 24 | 0–127 | /octatrack/rel |
| Dep 1 | 31 | 0–127 | /octatrack/dep_1 |
| Dep 2 | 32 | 0–127 | /octatrack/dep_2 |
| Dep 3 | 33 | 0–127 | /octatrack/dep_3 |
| Dump req | 61 | 0–127 | /octatrack/dump_req |
| Ptch | 16 | 0–127 | /octatrack/ptch |
| Rate | 19 | 0–127 | /octatrack/rate |
| Step strt | 17 | 0–127 | /octatrack/step_strt |
| Step len | 18 | 0–127 | /octatrack/step_len |
| On off | 49 | 0–127 | /octatrack/on_off |
| Vol 1 | 46 | 0–127 | /octatrack/vol_1 |
| Base | 34 | 0–127 | /octatrack/base |
| Wdth | 35 | 0–127 | /octatrack/wdth |
| Q | 36 | 0–127 | /octatrack/q |
| Time | 40 | 0–127 | /octatrack/time |
| Fb | 41 | 0–127 | /octatrack/fb |
| Send | 45 | 0–127 | /octatrack/send |
| Trk4 on off | 49 | 0–127 | /octatrack/trk4_on_off |
| 2 | 46 | 0–127 | /octatrack/2 |
| 3 | 46 | 0–127 | /octatrack/3 |
| 5 | 46 | 0–127 | /octatrack/5 |
| 6 | 46 | 0–127 | /octatrack/6 |
| 7 | 46 | 0–127 | /octatrack/7 |
| Trk8 on off | 49 | 0–127 | /octatrack/trk8_on_off |
| On off | 49 | 0–127 | /octatrack/on_off |
| On off | 49 | 0–127 | /octatrack/on_off |
| On off | 49 | 0–127 | /octatrack/on_off |
| On off | 49 | 0–127 | /octatrack/on_off |
| On off | 49 | 0–127 | /octatrack/on_off |
| Atk | 22 | 0–127 | /octatrack/atk |
| Spd1 step | 28 | 0–127 | /octatrack/spd1_step |
| Spd2 step | 29 | 0–127 | /octatrack/spd2_step |
| Spd3 step | 30 | 0–127 | /octatrack/spd3_step |
| Amp vol | 25 | -64–63 | /octatrack/amp_vol |
| Rel | 24 | 0–127 | /octatrack/rel |
| Dep 1 | 31 | 0–127 | /octatrack/dep_1 |
| Dep 2 | 32 | 0–127 | /octatrack/dep_2 |
| Dep 3 | 33 | 0–127 | /octatrack/dep_3 |
| Ptch | 16 | 0–127 | /octatrack/ptch |
| Rate | 19 | 0–127 | /octatrack/rate |
| Step strt | 17 | 0–127 | /octatrack/step_strt |
| Step len | 18 | 0–127 | /octatrack/step_len |
| Base | 34 | 0–127 | /octatrack/base |
| Wdth | 35 | 0–127 | /octatrack/wdth |
| Q | 36 | 0–127 | /octatrack/q |
| Time | 40 | 0–127 | /octatrack/time |
| Fb | 41 | 0–127 | /octatrack/fb |
| Send | 45 | 0–127 | /octatrack/send |
| Atk | 22 | 0–127 | /octatrack/atk |
| Spd1 step | 28 | 0–127 | /octatrack/spd1_step |
| Spd2 step | 29 | 0–127 | /octatrack/spd2_step |
| Spd3 step | 30 | 0–127 | /octatrack/spd3_step |
| Amp vol | 25 | -64–63 | /octatrack/amp_vol |
| Rel | 24 | 0–127 | /octatrack/rel |
| Dep 1 | 31 | 0–127 | /octatrack/dep_1 |
| Dep 2 | 32 | 0–127 | /octatrack/dep_2 |
| Dep 3 | 33 | 0–127 | /octatrack/dep_3 |
| Ptch | 16 | 0–127 | /octatrack/ptch |
| Rate | 19 | 0–127 | /octatrack/rate |
| Step strt | 17 | 0–127 | /octatrack/step_strt |
| Step len | 18 | 0–127 | /octatrack/step_len |
| Base | 34 | 0–127 | /octatrack/base |
| Wdth | 35 | 0–127 | /octatrack/wdth |
| Q | 36 | 0–127 | /octatrack/q |
| Time | 40 | 0–127 | /octatrack/time |
| Fb | 41 | 0–127 | /octatrack/fb |
| Send | 45 | 0–127 | /octatrack/send |
| Atk | 22 | 0–127 | /octatrack/atk |
| Spd1 step | 28 | 0–127 | /octatrack/spd1_step |
| Spd2 step | 29 | 0–127 | /octatrack/spd2_step |
| Spd3 step | 30 | 0–127 | /octatrack/spd3_step |
| Amp vol | 25 | -64–63 | /octatrack/amp_vol |
| Rel | 24 | 0–127 | /octatrack/rel |
| Dep 1 | 31 | 0–127 | /octatrack/dep_1 |
| Dep 2 | 32 | 0–127 | /octatrack/dep_2 |
| Dep 3 | 33 | 0–127 | /octatrack/dep_3 |
| Ptch | 16 | 0–127 | /octatrack/ptch |
| Rate | 19 | 0–127 | /octatrack/rate |
| Step strt | 17 | 0–127 | /octatrack/step_strt |
| Step len | 18 | 0–127 | /octatrack/step_len |
| Base | 34 | 0–127 | /octatrack/base |
| Wdth | 35 | 0–127 | /octatrack/wdth |
| Q | 36 | 0–127 | /octatrack/q |
| Time | 40 | 0–127 | /octatrack/time |
| Fb | 41 | 0–127 | /octatrack/fb |
| Send | 45 | 0–127 | /octatrack/send |
| Atk | 22 | 0–127 | /octatrack/atk |
| Spd1 step | 28 | 0–127 | /octatrack/spd1_step |
| Spd1 step | 29 | 0–127 | /octatrack/spd1_step |
| Spd3 step | 30 | 0–127 | /octatrack/spd3_step |
| Balance | 26 | -64–63 | /octatrack/balance |
| Rel | 24 | 0–127 | /octatrack/rel |
| Dep 1 | 31 | 0–127 | /octatrack/dep_1 |
| Dep 2 | 32 | 0–127 | /octatrack/dep_2 |
| Dep 3 | 33 | 0–127 | /octatrack/dep_3 |
| Ptch | 16 | 0–127 | /octatrack/ptch |
| Rate | 19 | 0–127 | /octatrack/rate |
| Step strt | 17 | 0–127 | /octatrack/step_strt |
| Step len | 18 | 0–127 | /octatrack/step_len |
| Base | 34 | 0–127 | /octatrack/base |
| Wdth | 35 | 0–127 | /octatrack/wdth |
| Q | 36 | 0–127 | /octatrack/q |
| Time | 40 | 0–127 | /octatrack/time |
| Fb | 41 | 0–127 | /octatrack/fb |
| Send | 45 | 0–127 | /octatrack/send |
| Atk | 22 | 0–127 | /octatrack/atk |
| Spd1 step | 28 | 0–127 | /octatrack/spd1_step |
| Spd2 step | 29 | 0–127 | /octatrack/spd2_step |
| Spd3 step | 30 | 0–127 | /octatrack/spd3_step |
| Balance | 26 | -64–63 | /octatrack/balance |
| Rel | 24 | 0–127 | /octatrack/rel |
| Dep 1 | 31 | 0–127 | /octatrack/dep_1 |
| Dep 2 | 32 | 0–127 | /octatrack/dep_2 |
| Dep 3 | 33 | 0–127 | /octatrack/dep_3 |
| Ptch | 16 | 0–127 | /octatrack/ptch |
| Rate | 19 | 0–127 | /octatrack/rate |
| Step strt | 17 | 0–127 | /octatrack/step_strt |
| Step len | 18 | 0–127 | /octatrack/step_len |
| Base | 34 | 0–127 | /octatrack/base |
| Wdth | 35 | 0–127 | /octatrack/wdth |
| Q | 36 | 0–127 | /octatrack/q |
| Time | 40 | 0–127 | /octatrack/time |
| Fb | 41 | 0–127 | /octatrack/fb |
| Send | 45 | 0–127 | /octatrack/send |
| Atk | 22 | 0–127 | /octatrack/atk |
| Spd1 step | 28 | 0–127 | /octatrack/spd1_step |
| Spd2 step | 29 | 0–127 | /octatrack/spd2_step |
| Spd3 step | 30 | 0–127 | /octatrack/spd3_step |
| Amp vol | 25 | -64–63 | /octatrack/amp_vol |
| Rel | 24 | 0–127 | /octatrack/rel |
| Dep 1 | 31 | 0–127 | /octatrack/dep_1 |
| Dep 2 | 32 | 0–127 | /octatrack/dep_2 |
| Dep 3 | 33 | 0–127 | /octatrack/dep_3 |
| Ptch | 16 | 0–127 | /octatrack/ptch |
| Rate | 19 | 0–127 | /octatrack/rate |
| Step strt | 17 | 0–127 | /octatrack/step_strt |
| Step len | 18 | 0–127 | /octatrack/step_len |
| Vol 4 | 46 | 0–127 | /octatrack/vol_4 |
| Base | 34 | 0–127 | /octatrack/base |
| Wdth | 35 | 0–127 | /octatrack/wdth |
| Q | 36 | 0–127 | /octatrack/q |
| Time | 40 | 0–127 | /octatrack/time |
| Fb | 41 | 0–127 | /octatrack/fb |
| Send | 45 | 0–127 | /octatrack/send |
| Atk | 22 | 0–127 | /octatrack/atk |
| Spd1 step | 28 | 0–127 | /octatrack/spd1_step |
| Spd1 step | 29 | 0–127 | /octatrack/spd1_step |
| Spd3 step | 30 | 0–127 | /octatrack/spd3_step |
| Balance | 26 | -64–63 | /octatrack/balance |
| Rel | 24 | 0–127 | /octatrack/rel |
| Dep 1 | 31 | 0–127 | /octatrack/dep_1 |
| Dep 2 | 32 | 0–127 | /octatrack/dep_2 |
| Dep 3 | 33 | 0–127 | /octatrack/dep_3 |
| Ptch | 16 | 0–127 | /octatrack/ptch |
| Rate | 19 | 0–127 | /octatrack/rate |
| Step strt | 17 | 0–127 | /octatrack/step_strt |
| Step len | 18 | 0–127 | /octatrack/step_len |
| Vol 8 | 46 | 0–127 | /octatrack/vol_8 |
| Base | 34 | 0–127 | /octatrack/base |
| Wdth | 35 | 0–127 | /octatrack/wdth |
| Q | 36 | 0–127 | /octatrack/q |
| Time | 40 | 0–127 | /octatrack/time |
| Fb | 41 | 0–127 | /octatrack/fb |
| Send | 45 | 0–127 | /octatrack/send |
| Str rtrg rtin | 20 | 0–127 | /octatrack/str_rtrg_rtin |
| Str rtrg rtin | 21 | 0–127 | /octatrack/str_rtrg_rtin |
| Str rtrg rtin | 20 | 0–127 | /octatrack/str_rtrg_rtin |
| Str rtrg rtin | 21 | 0–127 | /octatrack/str_rtrg_rtin |
| Str rtrg rtin | 20 | 0–127 | /octatrack/str_rtrg_rtin |
| Str rtrg rtin | 21 | 0–127 | /octatrack/str_rtrg_rtin |
| Str rtrg rtin | 20 | 0–127 | /octatrack/str_rtrg_rtin |
| Str rtrg rtin | 21 | 0–127 | /octatrack/str_rtrg_rtin |
| Str rtrg rtin | 20 | 0–127 | /octatrack/str_rtrg_rtin |
| Str rtrg rtin | 21 | 0–127 | /octatrack/str_rtrg_rtin |
| Str rtrg rtin | 20 | 0–127 | /octatrack/str_rtrg_rtin |
| Str rtrg rtin | 21 | 0–127 | /octatrack/str_rtrg_rtin |
| Tm fb snd bs | 43 | 0–127 | /octatrack/tm_fb_snd_bs |
| Tm fb snd bs | 43 | 0–127 | /octatrack/tm_fb_snd_bs |
| Tm fb snd bs | 43 | 0–127 | /octatrack/tm_fb_snd_bs |
| Tm fb snd bs | 43 | 0–127 | /octatrack/tm_fb_snd_bs |
| Tm fb snd bs | 43 | 0–127 | /octatrack/tm_fb_snd_bs |
| Tm fb snd bs | 43 | 0–127 | /octatrack/tm_fb_snd_bs |
Performance MIDI
Notes, pitch bend and any CC are also available: /octatrack/note/on <note> <velocity>, /octatrack/cc/<number> <value>, /octatrack/pitchbend <0-16383>, /octatrack/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 Elektron Octatrack is mapped in 3 versions. per Electra preset, per pencilresearch canonical CSV.
Frequently asked questions
How many parameters of the Elektron Octatrack can be controlled over MIDI?
SynthHub's map of the Elektron Octatrack lists 187 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 Elektron Octatrack?
Yes: SynthHub's hosted MCP server knows the Elektron Octatrack's MIDI map, and its browser relay lets the agent send it parameter changes or load a sound, each sound change confirmed by you.