Roland JX-8P: MIDI CC, NRPN and OSC map¶
The Roland JX-8P as named OSC addresses — 1 CC, 56 NRPN, 34 SysEx commands — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Roland JX-8P |
|---|---|
| Vendor | Roland |
| OSC prefix | /jx_8p |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per Electra preset |
| Upstream | electra-preset |
| Driver file | devices/roland/jx_8p.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/roland/jx_8p.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_8p: ask “what can the Roland JX-8P do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (57)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/jx_8p/range |
0 / 0 | 0–127 | continuous | ||
/jx_8p/waveform |
0 / 1 | 0–127 | continuous | ||
/jx_8p/tune |
0 / 2 | 0–127 | continuous | ||
/jx_8p/lfo_mod_depth |
0 / 3 | 0–127 | continuous | ||
/jx_8p/pwm_dyna |
0 / 61 | 0–127 | continuous | ||
/jx_8p/pwm_mode |
0 / 62 | 0–127 | continuous | ||
/jx_8p/level |
0 / 17 | 0–127 | continuous | ||
/jx_8p/env_1_key |
0 / 40 | 0–127 | continuous | ||
/jx_8p/env_mod_depth |
0 / 4 | 0–127 | continuous | ||
/jx_8p/pwm_1_width |
0 / 55 | 0–127 | continuous | ||
/jx_8p/pwm_1_lfo |
0 / 56 | 0–127 | continuous | ||
/jx_8p/pwm_1_env |
0 / 57 | 0–127 | continuous | ||
/jx_8p/range |
0 / 5 | 0–127 | continuous | ||
/jx_8p/waveform |
0 / 6 | 0–127 | continuous | ||
/jx_8p/tune |
0 / 8 | 0–127 | continuous | ||
/jx_8p/lfo_mod_depth |
0 / 10 | 0–127 | continuous | ||
/jx_8p/fine_tune |
0 / 9 | 0–127 | continuous | ||
/jx_8p/x_mod |
0 / 7 | 0–127 | continuous | ||
/jx_8p/level |
0 / 18 | 0–127 | continuous | ||
/jx_8p/env_1_key |
0 / 45 | 0–127 | continuous | ||
/jx_8p/env_mod_depth |
0 / 11 | 0–127 | continuous | ||
/jx_8p/pwm_2_width |
0 / 58 | 0–127 | continuous | ||
/jx_8p/pwm_2_lfo |
0 / 59 | 0–127 | continuous | ||
/jx_8p/pwm_2_env |
0 / 60 | 0–127 | continuous | ||
/jx_8p/mix_env |
0 / 19 | 0–127 | continuous | ||
/jx_8p/mixer_dynamics |
0 / 20 | 0–127 | continuous | ||
/jx_8p/mixer_env_mode |
0 / 21 | 0–127 | continuous | ||
/jx_8p/waveform |
0 / 33 | 0–127 | continuous | ||
/jx_8p/rate |
0 / 35 | 0–127 | continuous | ||
/jx_8p/lfo_delay |
0 / 34 | 0–127 | continuous | ||
/jx_8p/env_1 |
0 / 36 | 0–127 | continuous | ||
/jx_8p/env_1 |
0 / 37 | 0–127 | continuous | ||
/jx_8p/env_1 |
0 / 38 | 0–127 | continuous | ||
/jx_8p/env_1 |
0 / 39 | 0–127 | continuous | ||
/jx_8p/env_2 |
0 / 41 | 0–127 | continuous | ||
/jx_8p/env_2 |
0 / 42 | 0–127 | continuous | ||
/jx_8p/env_2 |
0 / 43 | 0–127 | continuous | ||
/jx_8p/env_2 |
0 / 44 | 0–127 | continuous | ||
/jx_8p/env_mode |
0 / 16 | 0–127 | continuous | ||
/jx_8p/dynamics |
0 / 15 | 0–127 | continuous | ||
/jx_8p/chorus |
0 / 32 | 0–127 | continuous | ||
/jx_8p/lfo_sync |
0 / 63 | 0–127 | continuous | ||
/jx_8p/vcf |
0 / 23 | 0–124 | continuous | ||
/jx_8p/resonance |
0 / 24 | 0–124 | continuous | ||
/jx_8p/env_mode |
0 / 29 | 0–127 | continuous | ||
/jx_8p/dynamics |
0 / 28 | 0–127 | continuous | ||
/jx_8p/hpf_cutoff |
0 / 22 | 0–127 | continuous | ||
/jx_8p/vcf_env |
0 / 26 | 0–124 | continuous | ||
/jx_8p/vcf_lfo |
0 / 25 | 0–124 | continuous | ||
/jx_8p/vcf_key |
0 / 27 | 0–124 | continuous | ||
/jx_8p/vca_level |
0 / 30 | 0–124 | continuous | ||
/jx_8p/dynamics |
0 / 31 | 0–127 | continuous | ||
/jx_8p/env_mode |
0 / 47 | 0–127 | continuous | ||
/jx_8p/semitone |
0 / 49 | 0–127 | continuous | ||
/jx_8p/porta_time |
1 / 73 | 0–127 | continuous | ||
/jx_8p/unison_detune |
0 / 48 | 0–127 | continuous | ||
/jx_8p/volume |
7 | 0–127 | continuous |
SysEx commands (34)¶
| OSC address | Arguments |
|---|---|
/jx_8p/range |
val: u7 |
/jx_8p/waveform |
val: u7 |
/jx_8p/tune |
val: u7 |
/jx_8p/lfo_mod_depth |
val: u7 |
/jx_8p/chorus |
val: u7 |
/jx_8p/level |
val: u7 |
/jx_8p/env_1 |
val: u7 |
/jx_8p/env_1_key |
val: u7 |
/jx_8p/env_mod_depth |
val: u7 |
/jx_8p/fine_tune |
val: u7 |
/jx_8p/env_2 |
val: u7 |
/jx_8p/x_mod |
val: u7 |
/jx_8p/env_mode |
val: u7 |
/jx_8p/dynamics |
val: u7 |
/jx_8p/mix_env |
val: u7 |
/jx_8p/mixer_dynamics |
val: u7 |
/jx_8p/mixer_env_mode |
val: u7 |
/jx_8p/rate |
val: u7 |
/jx_8p/delay |
val: u7 |
/jx_8p/vca_level |
val: u7 |
/jx_8p/lpf_cutoff |
val: u7 |
/jx_8p/resonance |
val: u7 |
/jx_8p/hpf_cutoff |
val: u7 |
/jx_8p/vcf_lfo |
val: u7 |
/jx_8p/vcf_key |
val: u7 |
/jx_8p/vcf_env |
val: u7 |
/jx_8p/semitone |
val: u7 |
/jx_8p/portamento |
val: u7 |
/jx_8p/porta_time |
val: u7 |
/jx_8p/unison_detune |
val: u7 |
/jx_8p/bend_amount |
val: u7 |
/jx_8p/tone |
val: u7 |
/jx_8p/bank |
val: u7 |
/jx_8p/pad_toggle |
val: u7 |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /jx_8p/note/on <note> <velocity>, /jx_8p/cc/<number> <value>, /jx_8p/pitchbend <0-16383>, /jx_8p/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.