Arturia MicroFreak: MIDI CC, NRPN and OSC map¶
The Arturia MicroFreak as named OSC addresses — 21 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Arturia MicroFreak |
|---|---|
| Vendor | Arturia |
| OSC prefix | /microfreak |
| 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/arturia/microfreak.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/arturia/microfreak.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 microfreak: ask “what can the Arturia MicroFreak do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (21)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/microfreak/general/glide |
5 | 0–127 | continuous | General | |
/microfreak/oscillator/type |
9 | 0–127 | continuous | Oscillator | |
/microfreak/oscillator/wave |
10 | 0–127 | continuous | Oscillator | |
/microfreak/oscillator/timbre |
12 | 0–127 | continuous | Oscillator | |
/microfreak/oscillator/shape |
13 | 0–127 | continuous | Oscillator | |
/microfreak/filter/cutoff |
23 | 0–127 | continuous | Filter | |
/microfreak/filter/resonance |
83 | 0–127 | continuous | Filter | |
/microfreak/cycling_envelope/cycling_env_rise |
102 | 0–127 | continuous | Cycling envelope | |
/microfreak/cycling_envelope/cycling_env_fall |
103 | 0–127 | continuous | Cycling envelope | |
/microfreak/cycling_envelope/cycling_env_hold |
28 | 0–127 | continuous | Cycling envelope | |
/microfreak/cycling_envelope/cycling_env_amount |
24 | 0–127 | continuous | Cycling envelope | |
/microfreak/arpeggiator_sequencer/arp_seq_rate_free |
91 | 0–127 | continuous | Arpeggiator/sequencer | |
/microfreak/arpeggiator_sequencer/arp_seq_rate_sync |
92 | 0–127 | continuous | Arpeggiator/sequencer | |
/microfreak/lfo/rate_free |
93 | 0–127 | continuous | LFO | |
/microfreak/lfo/rate_sync |
94 | 0–127 | continuous | LFO | |
/microfreak/envelope/attack |
105 | 0–127 | continuous | Envelope | |
/microfreak/envelope/decay |
106 | 0–127 | continuous | Envelope | |
/microfreak/envelope/sustain |
29 | 0–127 | continuous | Envelope | |
/microfreak/envelope/filter_amount |
26 | 0–127 | continuous | Envelope | |
/microfreak/keyboard/hold_button_toggle |
64 | 0–127 | continuous | Keyboard | |
/microfreak/keyboard/spice |
2 | 0–127 | continuous | Keyboard |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /microfreak/note/on <note> <velocity>, /microfreak/cc/<number> <value>, /microfreak/pitchbend <0-16383>, /microfreak/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.