Nord Lead A1: MIDI CC, NRPN and OSC map¶
The Nord Lead A1 as named OSC addresses — 59 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Nord Lead A1 |
|---|---|
| Vendor | Nord |
| OSC prefix | /lead_a1 |
| 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_a1.pencilresearch.fw-unknown.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_a1.pencilresearch.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 lead_a1: ask “what can the Nord Lead A1 do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (59)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/lead_a1/arpeggiator/run |
90 | 0–127 | continuous | Arpeggiator | |
/lead_a1/arpeggiator/tempo_clock_divisions |
9 | 0–127 | continuous | Arpeggiator | |
/lead_a1/arpeggiator/master_clock_enable |
86 | 0–127 | continuous | Arpeggiator | |
/lead_a1/arpeggiator/range |
88 | 0–127 | continuous | Arpeggiator | |
/lead_a1/arpeggiator/direction |
89 | 0–127 | continuous | Arpeggiator | |
/lead_a1/voice/mono_selector |
15 | 0–127 | continuous | Voice | |
/lead_a1/voice/mode_unison |
16 | 0–127 | continuous | Voice | |
/lead_a1/voice/glide_rate |
5 | 0–127 | continuous | Voice | |
/lead_a1/voice/pitch_bend_range |
118 | 0–127 | continuous | Voice | |
/lead_a1/voice/vibrato_select |
56 | 0–127 | continuous | Voice | |
/lead_a1/oscillator/waveform_selector |
30 | 0–127 | continuous | Oscillator | |
/lead_a1/oscillator/configuration |
33 | 0–127 | continuous | Oscillator | |
/lead_a1/oscillator/control |
31 | 0–127 | continuous | Oscillator | |
/lead_a1/oscillator/lfo_modulation_amount |
68 | 0–127 | continuous | Oscillator | |
/lead_a1/oscillator/modulation_envelope_amount |
69 | 0–127 | continuous | Oscillator | |
/lead_a1/filter/frequency |
74 | 0–127 | continuous | Filter | |
/lead_a1/filter/resonance |
42 | 0–127 | continuous | Filter | |
/lead_a1/filter/type |
44 | 0–127 | continuous | Filter | |
/lead_a1/filter/keyboard_tracking |
46 | 0–127 | continuous | Filter | |
/lead_a1/filter/drive |
47 | 0–127 | continuous | Filter | |
/lead_a1/filter/lfo_modulation_amount |
48 | 0–127 | continuous | Filter | |
/lead_a1/filter/modulation_envelope_amount |
43 | 0–127 | continuous | Filter | |
/lead_a1/amplifier_envelope/attack |
73 | 0–127 | continuous | Amplifier envelope | |
/lead_a1/amplifier_envelope/decay |
36 | 0–127 | continuous | Amplifier envelope | |
/lead_a1/amplifier_envelope/release |
72 | 0–127 | continuous | Amplifier envelope | |
/lead_a1/amplifier_envelope/velocity |
35 | 0–127 | continuous | Amplifier envelope | |
/lead_a1/modulation_envelope/attack |
26 | 0–127 | continuous | Modulation envelope | |
/lead_a1/modulation_envelope/decay_sustain |
27 | 0–127 | continuous | Modulation envelope | |
/lead_a1/modulation_envelope/release |
28 | 0–127 | continuous | Modulation envelope | |
/lead_a1/modulation_envelope/invert |
38 | 0–127 | continuous | Modulation envelope | |
/lead_a1/modulation_envelope/velocity |
29 | 0–127 | continuous | Modulation envelope | |
/lead_a1/lfo/rate_clock_divisions |
19 | 0–127 | continuous | LFO | |
/lead_a1/lfo/waveform_selector |
20 | 0–127 | continuous | LFO | |
/lead_a1/lfo/master_clock_enable |
2 | 0–127 | continuous | LFO | |
/lead_a1/lfo/envelope_selector |
34 | 0–127 | continuous | LFO | |
/lead_a1/effects/selection |
53 | 0–127 | continuous | Effects | |
/lead_a1/effects/amount |
55 | 0–127 | continuous | Effects | |
/lead_a1/effects/on_off |
52 | 0–127 | continuous | Effects | |
/lead_a1/delay/tempo_clock_divisions |
78 | 0–127 | continuous | Delay | |
/lead_a1/delay/master_clock_enable |
51 | 0–127 | continuous | Delay | |
/lead_a1/delay/feedback |
79 | 0–127 | continuous | Delay | |
/lead_a1/delay/ping_pong |
100 | 0–127 | continuous | Delay | |
/lead_a1/delay/amount |
76 | 0–127 | continuous | Delay | |
/lead_a1/delay/on_off |
99 | 0–127 | continuous | Delay | |
/lead_a1/reverb/selector |
96 | 0–127 | continuous | Reverb | |
/lead_a1/reverb/amount |
98 | 0–127 | continuous | Reverb | |
/lead_a1/reverb/on_off |
97 | 0–127 | continuous | Reverb | |
/lead_a1/output/level |
71 | 0–127 | continuous | Output | |
/lead_a1/output/pan |
10 | 0–127 | continuous | Output | |
/lead_a1/performance/octave_shift |
17 | 0–127 | continuous | Performance | |
/lead_a1/performance/hold |
58 | 0–127 | continuous | Performance | |
/lead_a1/performance/hold_enable |
54 | 0–127 | continuous | Performance | |
/lead_a1/performance/slot_focus |
119 | 0–127 | continuous | Performance | |
/lead_a1/performance/slot_enable |
115 | 0–127 | continuous | Performance | |
/lead_a1/controllers/modulation_wheel |
1 | 0–127 | continuous | Controllers | |
/lead_a1/controllers/wheel_pedal_morph |
11 | 0–127 | continuous | Controllers | |
/lead_a1/controllers/sustain_pedal |
64 | 0–127 | continuous | Controllers | |
/lead_a1/bank_select/msb |
0 | 0–127 | continuous | Bank select | |
/lead_a1/bank_select/lsb |
32 | 0–127 | continuous | Bank select |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /lead_a1/note/on <note> <velocity>, /lead_a1/cc/<number> <value>, /lead_a1/pitchbend <0-16383>, /lead_a1/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.