Roland JX-08: MIDI CC, NRPN and OSC map¶
The Roland JX-08 as named OSC addresses — 48 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Roland JX-08 |
|---|---|
| Vendor | Roland |
| OSC prefix | /jx_08 |
| Source | 📦 Derived from MIDI Guide (community CC/NRPN data) |
| Firmware | unknown |
| Revision | per pencilresearch canonical CSV |
| Upstream | pencilresearch |
| Data licence | CC-BY-SA-4.0 — MIDI Guide (https://midi.guide) by Pencil Research and contributors |
| Driver file | devices/roland/jx_08.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_08.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_08: ask “what can the Roland JX-08 do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (48)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/jx_08/general/modulation |
1 | 0–127 | continuous | General | |
/jx_08/general/portamento_time |
117 | 0–127 | continuous | General | |
/jx_08/general/pattern_part_level |
7 | 0–127 | continuous | General | |
/jx_08/general/expression_pedal |
11 | 0–127 | continuous | General | |
/jx_08/general/pitchbend |
41 | 0–127 | continuous | General | |
/jx_08/general/hold |
64 | 0–127 | continuous | General | |
/jx_08/general/reverb_send_level |
91 | 0–127 | continuous | General | |
/jx_08/general/portamento_switch |
118 | 0–127 | continuous | General | |
/jx_08/general/solo_poly_unison |
119 | 0–127 | continuous | General | |
/jx_08/lfo/delay_time |
27 | 0–127 | continuous | LFO | |
/jx_08/lfo/rate |
29 | 0–127 | continuous | LFO | |
/jx_08/lfo/waveform |
35 | 0–127 | continuous | LFO | |
/jx_08/dco/dco_1_tune |
20 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_1_range |
47 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_1_lfo |
26 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_1_waveform |
46 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_1_envelope_mode |
60 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_1_envelope_modulation |
21 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_2_tune |
87 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_2_finetune |
56 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_2_range |
62 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_2_lfo |
25 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_2_waveform |
61 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_2_envelope_mode |
63 | 0–127 | continuous | DCO | |
/jx_08/dco/dco_2_cross_modulation |
59 | 0–127 | continuous | DCO | |
/jx_08/mixer/dco_1_level |
16 | 0–127 | continuous | Mixer | |
/jx_08/mixer/dco_2_level |
17 | 0–127 | continuous | Mixer | |
/jx_08/mixer/envelope |
18 | 0–127 | continuous | Mixer | |
/jx_08/mixer/envelope_mode |
19 | 0–127 | continuous | Mixer | |
/jx_08/vcf/hpf_cutoff |
79 | 0–127 | continuous | VCF | |
/jx_08/vcf/cutoff |
3 | 0–127 | continuous | VCF | |
/jx_08/vcf/resonance |
9 | 0–127 | continuous | VCF | |
/jx_08/vcf/envelope_mode |
84 | 0–127 | continuous | VCF | |
/jx_08/vcf/envelope_modulation |
81 | 0–127 | continuous | VCF | |
/jx_08/vcf/key_follow |
82 | 0–127 | continuous | VCF | |
/jx_08/vcf/lfo_modulation |
28 | 0–127 | continuous | VCF | |
/jx_08/vca/envelope_mode |
109 | 0–127 | continuous | VCA | |
/jx_08/vca/level |
110 | 0–127 | continuous | VCA | |
/jx_08/envelopes/env_1_attack |
83 | 0–127 | continuous | Envelopes | |
/jx_08/envelopes/env_1_decay |
80 | 0–127 | continuous | Envelopes | |
/jx_08/envelopes/env_1_sustain |
85 | 0–127 | continuous | Envelopes | |
/jx_08/envelopes/env_1_release |
86 | 0–127 | continuous | Envelopes | |
/jx_08/envelopes/env_1_key_follow |
104 | 0–127 | continuous | Envelopes | |
/jx_08/envelopes/env_2_attack |
89 | 0–127 | continuous | Envelopes | |
/jx_08/envelopes/env_2_decay |
90 | 0–127 | continuous | Envelopes | |
/jx_08/envelopes/env_2_sustain |
102 | 0–127 | continuous | Envelopes | |
/jx_08/envelopes/env_2_release |
103 | 0–127 | continuous | Envelopes | |
/jx_08/envelopes/env_2_key_follow |
105 | 0–127 | continuous | Envelopes |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /jx_08/note/on <note> <velocity>, /jx_08/cc/<number> <value>, /jx_08/pitchbend <0-16383>, /jx_08/program_change <n>.
Limitations¶
CC/NRPN only. SysEx (preset management, display control, bulk dump/load, vendor-proprietary opcodes) is NOT covered by pencilresearch. To extend this device with SysEx, sniff the vendor editor, add `sysex.header/footer` + `commands` blocks, and use `update_device.md` PR template.