PreenFM Preen FM2 beta: MIDI CC, NRPN and OSC map¶
The PreenFM Preen FM2 beta as named OSC addresses — 1 NRPN, 20 SysEx commands — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | PreenFM Preen FM2 beta |
|---|---|
| Vendor | PreenFM |
| OSC prefix | /preen_fm2_beta |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per Electra preset |
| Upstream | electra-preset |
| Driver file | devices/preenfm/preen_fm2_beta.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/preenfm/preen_fm2_beta.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 preen_fm2_beta: ask “what can the PreenFM Preen FM2 beta do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (1)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/preen_fm2_beta/nrpn |
2 / 81 | 0–127 | continuous |
SysEx commands (20)¶
| OSC address | Arguments |
|---|---|
/preen_fm2_beta/range |
val: u7 |
/preen_fm2_beta/step |
val: u7 |
/preen_fm2_beta/mode |
val: u7 |
/preen_fm2_beta/time |
val: u7 |
/preen_fm2_beta/glissando |
val: u7 |
/preen_fm2_beta/master |
val: u7 |
/preen_fm2_beta/pitch |
val: u7 |
/preen_fm2_beta/amplitude |
val: u7 |
/preen_fm2_beta/eg_bias |
val: u7 |
/preen_fm2_beta/pitch_env |
val: u7 |
/preen_fm2_beta/mod_sensitivity |
val: u7 |
/preen_fm2_beta/waveform |
val: u7 |
/preen_fm2_beta/speed |
val: u7 |
/preen_fm2_beta/delay |
val: u7 |
/preen_fm2_beta/pitch_mod_depth |
val: u7 |
/preen_fm2_beta/amp_mod_depth |
val: u7 |
/preen_fm2_beta/synchronize |
val: u7 |
/preen_fm2_beta/feedback |
val: u7 |
/preen_fm2_beta/osc_key_sync |
val: u7 |
/preen_fm2_beta/transpose |
val: u7 |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /preen_fm2_beta/note/on <note> <velocity>, /preen_fm2_beta/cc/<number> <value>, /preen_fm2_beta/pitchbend <0-16383>, /preen_fm2_beta/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.