u-he REPRO-5 MIDI CC chart, NRPN and OSC map¶
The u-he REPRO-5 MIDI implementation: 62 CC, each named, for Claude (MCP), SuperCollider or any OSC app.
| Device | u-he REPRO-5 |
|---|---|
| Vendor | u-he |
| OSC prefix | /repro_5 |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per Electra preset |
| Upstream | electra-preset |
| Driver file | devices/u-he/repro_5.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/u-he/repro_5.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 repro_5: ask “what can the u-he REPRO-5 do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (62)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/repro_5/filter_env |
37 | 0–100 | continuous | ||
/repro_5/osc_b |
38 | 0–100 | continuous | ||
/repro_5/freq_a |
39 | 0–127 | continuous | ||
/repro_5/pw_a |
40 | 0–127 | continuous | ||
/repro_5/filter |
41 | 0–127 | continuous | ||
/repro_5/host_sync |
31 | 0–127 | continuous | ||
/repro_5/time_base |
32 | 0–127 | continuous | ||
/repro_5/lfo_rate |
33 | 0–100 | continuous | ||
/repro_5/saw |
34 | 0–127 | continuous | ||
/repro_5/tri |
35 | 0–127 | continuous | ||
/repro_5/square |
36 | 0–127 | continuous | ||
/repro_5/lfo_noise |
96 | -50–50 | continuous | ||
/repro_5/freq_a |
97 | 0–127 | continuous | ||
/repro_5/freq_b |
98 | 0–127 | continuous | ||
/repro_5/pw_a |
99 | 0–127 | continuous | ||
/repro_5/pw_b |
100 | 0–127 | continuous | ||
/repro_5/filter |
101 | 0–127 | continuous | ||
/repro_5/tune |
26 | -12–12 | continuous | ||
/repro_5/output |
27 | 0–200 | continuous | ||
/repro_5/i_o |
46 | 0–127 | continuous | ||
/repro_5/type |
47 | 0–127 | continuous | ||
/repro_5/amount |
48 | 0–60 | continuous | ||
/repro_5/tone |
49 | 0–100 | continuous | ||
/repro_5/mix |
50 | 0–100 | continuous | ||
/repro_5/frequency |
3 | -60–60 | continuous | ||
/repro_5/octave |
8 | 0–127 | continuous | ||
/repro_5/saw |
9 | 0–127 | continuous | ||
/repro_5/square |
10 | 0–127 | continuous | ||
/repro_5/pulse_width |
12 | 0–100 | continuous | ||
/repro_5/sync |
13 | 0–127 | continuous | ||
/repro_5/fine_tune_osca |
25 | -20–20 | continuous | ||
/repro_5/frequency |
14 | -60–60 | continuous | ||
/repro_5/octave |
15 | 0–127 | continuous | ||
/repro_5/saw |
16 | 0–127 | continuous | ||
/repro_5/triangle |
17 | 0–127 | continuous | ||
/repro_5/square |
18 | 0–127 | continuous | ||
/repro_5/pulse_width |
19 | 0–100 | continuous | ||
/repro_5/lo_freq |
20 | 0–127 | continuous | ||
/repro_5/kybd |
21 | 0–127 | continuous | ||
/repro_5/fine_tune_oscb |
30 | -20–20 | continuous | ||
/repro_5/osc_a |
22 | 0–100 | continuous | ||
/repro_5/osc_b |
23 | 0–100 | continuous | ||
/repro_5/noise |
24 | 0–100 | continuous | ||
/repro_5/unison |
28 | 0–127 | continuous | ||
/repro_5/glide |
5 | 0–100 | continuous | ||
/repro_5/voice_detune |
29 | 0–100 | continuous | ||
/repro_5/cutoff |
42 | 0–100 | continuous | ||
/repro_5/resonance |
43 | 0–100 | continuous | ||
/repro_5/env_amount |
44 | 0–100 | continuous | ||
/repro_5/kybd_amount |
45 | 0–100 | continuous | ||
/repro_5/attack |
90 | 0–100 | continuous | ||
/repro_5/attack |
91 | 0–100 | continuous | ||
/repro_5/attack |
92 | 0–100 | continuous | ||
/repro_5/attack |
93 | 0–100 | continuous | ||
/repro_5/velocity |
94 | 0–100 | continuous | ||
/repro_5/attack |
86 | 0–100 | continuous | ||
/repro_5/attack |
87 | 0–100 | continuous | ||
/repro_5/attack |
88 | 0–100 | continuous | ||
/repro_5/attack |
89 | 0–100 | continuous | ||
/repro_5/velocity |
95 | 0–100 | continuous | ||
/repro_5/depth |
102 | -100–100 | continuous | ||
/repro_5/depth |
103 | -100–100 | continuous |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /repro_5/note/on <note> <velocity>, /repro_5/cc/<number> <value>, /repro_5/pitchbend <0-16383>, /repro_5/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.
Frequently asked questions¶
Which MIDI CC controls the filter cutoff on the u-he REPRO-5?
CC 41 (0–127), named /repro_5/filter in SynthHub's map.
How many parameters of the u-he REPRO-5 can be controlled over MIDI?
SynthHub's map of the u-he REPRO-5 lists 62 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 u-he REPRO-5?
Yes: SynthHub's hosted MCP server knows the u-he REPRO-5's MIDI map, and its browser relay lets the agent send it parameter changes or load a sound, each sound change confirmed by you.