devices/softube/heartbeat.electra-community-v01.fw-unknown.jsonEdit on GitHubJSONSoftube Heartbeat MIDI CC chart, NRPN and OSC map
The Softube Heartbeat MIDI implementation: 90 CC, each named, for Claude (MCP), SuperCollider or any OSC app.
- sourceElectra One preset
- real unitnot yet checked
Not checked on a real Softube Heartbeat yet. Own one? Load a sound or send a control, and tell us whether it worked.
- Maker
- Softube
- Version
- per Electra preset
- Source
- Electra One preset
- OSC prefix
/heartbeat
Use 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/softube/heartbeat.electra-community-v01.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 heartbeat: ask “what can the Softube Heartbeat do?” and it reads this map with list_routes. See the MCP guide.
MIDI controls
90 controls, each with its number, its range and the name to send
| Control | CC | Range | Name to send |
|---|---|---|---|
| Decay | 3 | 0–127 | /heartbeat/decay |
| Attack | 9 | 0–127 | /heartbeat/attack |
| Attack type | 14 | 0–127 | /heartbeat/attack_type |
| Decay | 41 | 0–127 | /heartbeat/decay |
| Attack | 46 | 0–127 | /heartbeat/attack |
| Eq | 15 | 0–127 | /heartbeat/eq |
| Pitch | 20 | 0–127 | /heartbeat/pitch |
| Bend | 31 | 0–127 | /heartbeat/bend |
| Harmonics | 35 | 0–127 | /heartbeat/harmonics |
| Eq | 47 | 0–127 | /heartbeat/eq |
| Pitch | 52 | 0–127 | /heartbeat/pitch |
| Wave synth | 53 | 0–127 | /heartbeat/wave_synth |
| Type | 54 | 0–127 | /heartbeat/type |
| Pitch | 55 | 0–127 | /heartbeat/pitch |
| Decay | 56 | 0–127 | /heartbeat/decay |
| Harmonics | 61 | 0–127 | /heartbeat/harmonics |
| Eq | 57 | 0–127 | /heartbeat/eq |
| Type | 58 | 0–127 | /heartbeat/type |
| Pitch | 59 | 0–127 | /heartbeat/pitch |
| Decay | 60 | 0–127 | /heartbeat/decay |
| Velocity | 62 | 0–127 | /heartbeat/velocity |
| To pitch | 63 | 0–127 | /heartbeat/to_pitch |
| Wave synth | 85 | 0–127 | /heartbeat/wave_synth |
| Type | 86 | 0–127 | /heartbeat/type |
| Pitch | 87 | 0–127 | /heartbeat/pitch |
| Decay | 88 | 0–127 | /heartbeat/decay |
| To attack | 104 | 0–127 | /heartbeat/to_attack |
| To decay | 105 | 0–127 | /heartbeat/to_decay |
| Eq | 89 | 0–127 | /heartbeat/eq |
| Type | 90 | 0–127 | /heartbeat/type |
| Pitch | 102 | 0–127 | /heartbeat/pitch |
| Decay | 103 | 0–127 | /heartbeat/decay |
| Time gate | 106 | 0–127 | /heartbeat/time_gate |
| Wave synth | 107 | 0–127 | /heartbeat/wave_synth |
| Type | 108 | 0–127 | /heartbeat/type |
| Pitch | 109 | 0–127 | /heartbeat/pitch |
| Decay | 115 | 0–127 | /heartbeat/decay |
| Ring | 116 | 0–127 | /heartbeat/ring |
| Eq | 111 | 0–127 | /heartbeat/eq |
| Type | 112 | 0–127 | /heartbeat/type |
| Pitch | 113 | 0–127 | /heartbeat/pitch |
| Decay | 114 | 0–127 | /heartbeat/decay |
| Eq | 117 | 0–127 | /heartbeat/eq |
| Pitch | 118 | 0–127 | /heartbeat/pitch |
| Mode | 119 | 0–127 | /heartbeat/mode |
| Decay | 3 | 0–127 | /heartbeat/decay |
| Pitch | 9 | 0–127 | /heartbeat/pitch |
| Range | 14 | 0–127 | /heartbeat/range |
| Eq | 15 | 0–127 | /heartbeat/eq |
| Tone | 20 | 0–127 | /heartbeat/tone |
| Time | 31 | 0–127 | /heartbeat/time |
| Mode | 41 | 0–127 | /heartbeat/mode |
| Decay | 46 | 0–127 | /heartbeat/decay |
| Pitch | 47 | 0–127 | /heartbeat/pitch |
| Range | 52 | 0–127 | /heartbeat/range |
| Eq | 53 | 0–127 | /heartbeat/eq |
| Tone | 54 | 0–127 | /heartbeat/tone |
| Time | 55 | 0–127 | /heartbeat/time |
| Drum | 57 | 0–127 | /heartbeat/drum |
| Layer fill | 58 | 0–127 | /heartbeat/layer_fill |
| Drum | 59 | 0–127 | /heartbeat/drum |
| Layer fill | 60 | 0–127 | /heartbeat/layer_fill |
| Drum | 61 | 0–127 | /heartbeat/drum |
| Layer fill | 62 | 0–127 | /heartbeat/layer_fill |
| Drum | 118 | 0–127 | /heartbeat/drum |
| Chaos 1 | 113 | 0–127 | /heartbeat/chaos_1 |
| Drum | 63 | 0–127 | /heartbeat/drum |
| Layer fill | 85 | 0–127 | /heartbeat/layer_fill |
| Drum | 86 | 0–127 | /heartbeat/drum |
| Layer fill | 87 | 0–127 | /heartbeat/layer_fill |
| Drum | 88 | 0–127 | /heartbeat/drum |
| Layer fill | 89 | 0–127 | /heartbeat/layer_fill |
| Drum | 119 | 0–127 | /heartbeat/drum |
| Chaos 2 | 114 | 0–127 | /heartbeat/chaos_2 |
| Alm on off | 117 | 0–127 | /heartbeat/alm_on_off |
| Drum | 90 | 0–127 | /heartbeat/drum |
| Layer fill | 102 | 0–127 | /heartbeat/layer_fill |
| Drum | 103 | 0–127 | /heartbeat/drum |
| Layer fill | 104 | 0–127 | /heartbeat/layer_fill |
| Drum | 105 | 0–127 | /heartbeat/drum |
| Layer fill | 106 | 0–127 | /heartbeat/layer_fill |
| Drum | 3 | 0–127 | /heartbeat/drum |
| Chaos 3 | 115 | 0–127 | /heartbeat/chaos_3 |
| Layer fill | 108 | 0–127 | /heartbeat/layer_fill |
| Drum | 109 | 0–127 | /heartbeat/drum |
| Layer fill | 110 | 0–127 | /heartbeat/layer_fill |
| Drum | 111 | 0–127 | /heartbeat/drum |
| Layer fill | 112 | 0–127 | /heartbeat/layer_fill |
| Drum | 9 | 0–127 | /heartbeat/drum |
| Chaos 4 | 116 | 0–127 | /heartbeat/chaos_4 |
Performance MIDI
Notes, pitch bend and any CC are also available: /heartbeat/note/on <note> <velocity>, /heartbeat/cc/<number> <value>, /heartbeat/pitchbend <0-16383>, /heartbeat/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
How many parameters of the Softube Heartbeat can be controlled over MIDI?
SynthHub's map of the Softube Heartbeat lists 90 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 Softube Heartbeat?
Yes: SynthHub's hosted MCP server knows the Softube Heartbeat's MIDI map, and its browser relay lets the agent send it parameter changes or load a sound, each sound change confirmed by you.