Nord Lead (Rack) 2X: MIDI CC, NRPN and OSC map¶
The Nord Lead (Rack) 2X as named OSC addresses — 42 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Nord Lead (Rack) 2X |
|---|---|
| Vendor | Nord |
| OSC prefix | /lead_rack_2x |
| 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/nord/lead_rack_2x.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/nord/lead_rack_2x.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 lead_rack_2x: ask “what can the Nord Lead (Rack) 2X do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (42)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/lead_rack_2x/porta_time |
5 | 0–127 | continuous | ||
/lead_rack_2x/porta_auto |
65 | 0–127 | continuous | ||
/lead_rack_2x/gain |
7 | 0–127 | continuous | ||
/lead_rack_2x/polymode |
15 | 0–127 | continuous | ||
/lead_rack_2x/unison |
16 | 0–127 | continuous | ||
/lead_rack_2x/oct_shift |
17 | 0–127 | continuous | ||
/lead_rack_2x/mw_destination |
18 | 0–127 | continuous | ||
/lead_rack_2x/lfo1_rate |
19 | 0–127 | continuous | ||
/lead_rack_2x/lfo1_wave |
20 | 0–127 | continuous | ||
/lead_rack_2x/lfo1_dest |
21 | 0–127 | continuous | ||
/lead_rack_2x/lfo1_amt |
22 | 0–127 | continuous | ||
/lead_rack_2x/lfo2_rate |
23 | 0–127 | continuous | ||
/lead_rack_2x/lfo2_mode |
24 | 0–127 | continuous | ||
/lead_rack_2x/lfo2_amt |
25 | 0–127 | continuous | ||
/lead_rack_2x/mod_atk |
26 | 0–127 | continuous | ||
/lead_rack_2x/mod_dec |
27 | 0–127 | continuous | ||
/lead_rack_2x/mod_dest |
28 | 0–127 | continuous | ||
/lead_rack_2x/mod_depth |
29 | 0–127 | continuous | ||
/lead_rack_2x/o1_wave |
30 | 0–127 | continuous | ||
/lead_rack_2x/o2_wave |
31 | 0–127 | continuous | ||
/lead_rack_2x/o2_fine |
33 | 0–127 | continuous | ||
/lead_rack_2x/o2_keytrack |
34 | 0–127 | continuous | ||
/lead_rack_2x/o2_semi |
78 | 0–127 | continuous | ||
/lead_rack_2x/osc_sync |
35 | 0–127 | continuous | ||
/lead_rack_2x/osc_fm_amt |
70 | 0–127 | continuous | ||
/lead_rack_2x/osc_pw |
79 | 0–127 | continuous | ||
/lead_rack_2x/osc_mix |
8 | 0–127 | continuous | ||
/lead_rack_2x/vcf_atk |
38 | 0–127 | continuous | ||
/lead_rack_2x/vcf_dec |
39 | 0–127 | continuous | ||
/lead_rack_2x/vcf_sust |
40 | 0–127 | continuous | ||
/lead_rack_2x/vcf_rel |
41 | 0–127 | continuous | ||
/lead_rack_2x/vcf_res |
42 | 0–127 | continuous | ||
/lead_rack_2x/vcf_amt |
43 | 0–127 | continuous | ||
/lead_rack_2x/vcf_mode |
44 | 0–127 | continuous | ||
/lead_rack_2x/vcf_velo |
45 | 0–127 | continuous | ||
/lead_rack_2x/vcf_keytrack |
46 | 0–127 | continuous | ||
/lead_rack_2x/vcf_cut |
74 | 0–127 | continuous | ||
/lead_rack_2x/vcf_distortion |
80 | 0–127 | continuous | ||
/lead_rack_2x/vca_atk |
73 | 0–127 | continuous | ||
/lead_rack_2x/vca_dec |
36 | 0–127 | continuous | ||
/lead_rack_2x/vca_sust |
37 | 0–127 | continuous | ||
/lead_rack_2x/vca_rel |
72 | 0–127 | continuous |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /lead_rack_2x/note/on <note> <velocity>, /lead_rack_2x/cc/<number> <value>, /lead_rack_2x/pitchbend <0-16383>, /lead_rack_2x/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.