devices/roland/jx_3p.electra-feinsveur.fw-tauntek.jsonEdit on GitHubJSONRoland JX-3P (per Electra preset) MIDI CC chart, NRPN and OSC map
The Roland JX-3P MIDI implementation: 34 CC, each named, for Claude (MCP), SuperCollider or any OSC app.
- sourceElectra One preset
- firmwaretauntek
- real unitnot yet checked
Not checked on a real Roland JX-3P yet. Own one? Load a sound or send a control, and tell us whether it worked.
- Maker
- Roland
- Version
- per Electra preset
- Source
- Electra One preset
- OSC prefix
/jx_3p
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/roland/jx_3p.electra-feinsveur.fw-tauntek.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 jx_3p: ask “what can the Roland JX-3P do?” and it reads this map with list_routes. See the MCP guide.
MIDI controls
34 controls, each with its number, its range and the name to send
| Control | CC | Range | Name to send |
|---|---|---|---|
| Octave | 32 | 0–127 | /jx_3p/octave |
| Waveform | 33 | 0–127 | /jx_3p/waveform |
| Env mod | 39 | 0–127 | /jx_3p/env_mod |
| Lfo mod | 40 | 0–127 | /jx_3p/lfo_mod |
| Chorus | 45 | 0–127 | /jx_3p/chorus |
| Octave | 34 | 0–127 | /jx_3p/octave |
| Waveform | 35 | 0–127 | /jx_3p/waveform |
| Env mod | 41 | 0–127 | /jx_3p/env_mod |
| Lfo mod | 42 | 0–127 | /jx_3p/lfo_mod |
| Detune | 15 | 0–127 | /jx_3p/detune |
| Fine tune | 14 | 0–127 | /jx_3p/fine_tune |
| Cutoff | 21 | 0–127 | /jx_3p/cutoff |
| Hpf | 19 | 0–127 | /jx_3p/hpf |
| Vca level | 25 | 0–127 | /jx_3p/vca_level |
| Envelope | 28 | 0–127 | /jx_3p/envelope |
| Envelope | 29 | 0–127 | /jx_3p/envelope |
| Envelope | 30 | 0–127 | /jx_3p/envelope |
| Envelope | 31 | 0–127 | /jx_3p/envelope |
| Dco mix | 18 | 0–127 | /jx_3p/dco_mix |
| Resonance | 20 | 0–127 | /jx_3p/resonance |
| Filter key | 24 | 0–127 | /jx_3p/filter_key |
| Filter env | 22 | 0–127 | /jx_3p/filter_env |
| Polarity | 37 | 0–127 | /jx_3p/polarity |
| Vca mode | 38 | 0–127 | /jx_3p/vca_mode |
| Dco depth | 16 | 0–127 | /jx_3p/dco_depth |
| Lfo delay | 27 | 0–127 | /jx_3p/lfo_delay |
| Filter depth | 23 | 0–127 | /jx_3p/filter_depth |
| Env polarity | 44 | 0–127 | /jx_3p/env_polarity |
| X mod | 36 | 0–127 | /jx_3p/x_mod |
| Lfo rate | 26 | 0–127 | /jx_3p/lfo_rate |
| Dco depth | 17 | 0–127 | /jx_3p/dco_depth |
| Waveform | 43 | 0–127 | /jx_3p/waveform |
| Vel dynamics | 46 | 0–127 | /jx_3p/vel_dynamics |
| Key assign | 47 | 0–127 | /jx_3p/key_assign |
Performance MIDI
Notes, pitch bend and any CC are also available: /jx_3p/note/on <note> <velocity>, /jx_3p/cc/<number> <value>, /jx_3p/pitchbend <0-16383>, /jx_3p/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 Roland JX-3P is mapped in 3 versions. per Electra preset, per Electra preset.
Frequently asked questions
Which MIDI CC controls the filter cutoff on the Roland JX-3P?
CC 21 (0–127), named /jx_3p/cutoff in SynthHub's map.
How many parameters of the Roland JX-3P can be controlled over MIDI?
SynthHub's map of the Roland JX-3P lists 34 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 Roland JX-3P?
Yes: SynthHub's hosted MCP server knows the Roland JX-3P's MIDI map, and its browser relay lets the agent send it parameter changes or load a sound, each sound change confirmed by you.