devices/yamaha/dx7.electra-kiwigrass-editor-nt-v2.fw-unknown.jsonEdit on GitHubJSONYamaha DX7 (per Electra preset) MIDI CC chart, NRPN and OSC map
The Yamaha DX7 MIDI implementation: 55 CC, 36 SysEx commands, each named, for Claude (MCP), SuperCollider or any OSC app.
- sourceElectra One preset
- real unitnot yet checked
Not checked on a real Yamaha DX7 yet. Own one? Load a sound or send a control, and tell us whether it worked.
- Maker
- Yamaha
- Version
- per Electra preset
- Source
- Electra One preset
- OSC prefix
/dx7
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/yamaha/dx7.electra-kiwigrass-editor-nt-v2.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 dx7: ask “what can the Yamaha DX7 do?” and it reads this map with list_routes. See the MCP guide.
MIDI controls
91 controls, each with its number, its range and the name to send
| Control | CC | Range | Name to send |
|---|---|---|---|
| Chord enable | 61 | 0–127 | /dx7/chord_enable |
| Key | 62 | 0–127 | /dx7/key |
| Mode | 63 | 0–127 | /dx7/mode |
| Scale | 64 | 0–127 | /dx7/scale |
| Shape | 65 | 0–127 | /dx7/shape |
| Inversion | 66 | 0–127 | /dx7/inversion |
| Root deg | 67 | 0–127 | /dx7/root_deg |
| Cantus primus | 68 | 0–127 | /dx7/cantus_primus |
| Position | 69 | 0–127 | /dx7/position |
| Break direct | 70 | 0–127 | /dx7/break_direct |
| Break time | 71 | 0–127 | /dx7/break_time |
| Arpeggio | 72 | 0–127 | /dx7/arpeggio |
| Octave range | 73 | 0–127 | /dx7/octave_range |
| Transpose | 10 | 0–127 | /dx7/transpose |
| Fine tune | 0 / 32 | -100–100 | /dx7/fine_tune |
| Brightness | 11 | 0–127 | /dx7/brightness |
| Env scale | 12 | 0–127 | /dx7/env_scale |
| Gain | 7 | 0–127 | /dx7/gain |
| Press vol | 1 / 33 | -100–100 | /dx7/press_vol |
| Press brt | 2 / 34 | -200–200 | /dx7/press_brt |
| Midi ch | 30 | 0–127 | /dx7/midi_ch |
| Sustain | 14 | 0–127 | /dx7/sustain |
| Bend range | 15 | 0–48 | /dx7/bend_range |
| Sustain mode | 13 | 0–127 | /dx7/sustain_mode |
| Left out | 28 | 0–64 | /dx7/left_out |
| Right out | 27 | 0–64 | /dx7/right_out |
| Reverb mix | 90 | 0–127 | /dx7/reverb_mix |
| Time | 91 | 0–127 | /dx7/time |
| Model | 92 | 0–127 | /dx7/model |
| Size | 93 | 0–127 | /dx7/size |
| Mod speed | 94 | 1–500 | /dx7/mod_speed |
| Mod depth | 95 | 0–127 | /dx7/mod_depth |
| High damp | 96 | 0–127 | /dx7/high_damp |
| Early gain | 97 | 0–127 | /dx7/early_gain |
| Diffuse gain | 98 | 0–127 | /dx7/diffuse_gain |
| Output mode | 99 | 0–127 | /dx7/output_mode |
| Bypass reverb | 100 | 0–127 | /dx7/bypass_reverb |
| Delay mix | 102 | 0–127 | /dx7/delay_mix |
| Model | 101 | 0–127 | /dx7/model |
| Level | 103 | 0–127 | /dx7/level |
| Time | 104 | 0–127 | /dx7/time |
| Feedback | 105 | 0–127 | /dx7/feedback |
| Initial pan | 106 | 0–127 | /dx7/initial_pan |
| Delay multiple | 107 | 0–127 | /dx7/delay_multiple |
| Clock source | 108 | 0–127 | /dx7/clock_source |
| Midi divisor | 109 | 0–127 | /dx7/midi_divisor |
| Midi numerator | 110 | 0–127 | /dx7/midi_numerator |
| Output mode | 112 | 0–127 | /dx7/output_mode |
| Bypass delay | 111 | 0–127 | /dx7/bypass_delay |
| Chorus mode | 113 | 0–127 | /dx7/chorus_mode |
| Output mode | 114 | 0–127 | /dx7/output_mode |
| Bypass chorus | 115 | 0–127 | /dx7/bypass_chorus |
| Bank | 20 | 0–127 | /dx7/bank |
| Voice | 21 | 0–127 | /dx7/voice |
| Mute poly fm | 19 | 0–127 | /dx7/mute_poly_fm |
SysEx commands
| Command | Arguments | Name to send |
|---|---|---|
| Feedback | val: u7 | /dx7/feedback |
| Lfo key sync | val: u7 | /dx7/lfo_key_sync |
| Osc key sync | val: u7 | /dx7/osc_key_sync |
| Lfo speed | val: u7 | /dx7/lfo_speed |
| Lfo delay | val: u7 | /dx7/lfo_delay |
| P mod depth | val: u7 | /dx7/p_mod_depth |
| P mod sens | val: u7 | /dx7/p_mod_sens |
| A mod depth | val: u7 | /dx7/a_mod_depth |
| Output level | val: u7 | /dx7/output_level |
| Freq fine | val: u7 | /dx7/freq_fine |
| Ratio fixed | val: u7 | /dx7/ratio_fixed |
| A mod sens | val: u7 | /dx7/a_mod_sens |
| Detune | val: u7 | /dx7/detune |
| Velocity sens | val: u7 | /dx7/velocity_sens |
| Lfo waveform | val: u7 | /dx7/lfo_waveform |
| Char1 | val: u7 | /dx7/char1 |
| Char2 | val: u7 | /dx7/char2 |
| Char3 | val: u7 | /dx7/char3 |
| Char4 | val: u7 | /dx7/char4 |
| Char5 | val: u7 | /dx7/char5 |
| Char6 | val: u7 | /dx7/char6 |
| Char7 | val: u7 | /dx7/char7 |
| Char8 | val: u7 | /dx7/char8 |
| Char9 | val: u7 | /dx7/char9 |
| Algorithm | val: u7 | /dx7/algorithm |
| Op6 freq fine | val: u7 | /dx7/op6_freq_fine |
| L depth | val: u7 | /dx7/l_depth |
| Rate scaling | val: u7 | /dx7/rate_scaling |
| R depth | val: u7 | /dx7/r_depth |
| L curve | val: u7 | /dx7/l_curve |
| Break point | val: u7 | /dx7/break_point |
| R curve | val: u7 | /dx7/r_curve |
| Freq coarse | val: u7 | /dx7/freq_coarse |
| Key transpose | val: u7 | /dx7/key_transpose |
| Eg level rate | val: u7 | /dx7/eg_level_rate |
| Pitch eg | val: u7 | /dx7/pitch_eg |
Performance MIDI
Notes, pitch bend and any CC are also available: /dx7/note/on <note> <velocity>, /dx7/cc/<number> <value>, /dx7/pitchbend <0-16383>, /dx7/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.
Firmwares
The Yamaha DX7 runs 7 firmwares SynthHub maps, each with its own MIDI or another's it shares. All the devices with several: firmwares.
| Firmware | From | Licence | MIDI | Sounds |
|---|---|---|---|---|
| DX7 DX-MAX(3)+ User Guide v2.00 | musictechnologiesgroup.com | same as yamaha/dx7.knobkraft.fw-unknown | ||
| DX7 MiniMAX User Guide v2.20 | musictechnologiesgroup.com | same as yamaha/dx7.knobkraft.fw-unknown | ||
| DX7 SPECIAL EDITION ROM instruction guide | musictechnologiesgroup.com | same as yamaha/dx7.knobkraft.fw-unknown | ||
| DX7 SuperMAX+ User Guide | musictechnologiesgroup.com | adds to yamaha/dx7.knobkraft.fw-unknown | ||
| DX7-4X-EXP User Guide v2.11 | musictechnologiesgroup.com | same as yamaha/dx7.knobkraft.fw-unknown | ||
| DX7-8X-EXP User Guide v2.22 | musictechnologiesgroup.com | same as yamaha/dx7.knobkraft.fw-unknown | ||
| DX7mega128 User Guide v1.30 | musictechnologiesgroup.com | same as yamaha/dx7.knobkraft.fw-unknown |
Other sources
The Yamaha DX7 is mapped in 10 versions. per Electra preset, per KnobKraft Orm adaptation 'Yamaha DX7'.
Frequently asked questions
Which MIDI CC controls the filter cutoff on the Yamaha DX7?
CC 11 (0–127), named /dx7/brightness in SynthHub's map.
How many parameters of the Yamaha DX7 can be controlled over MIDI?
SynthHub's map of the Yamaha DX7 lists 55 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 Yamaha DX7?
Yes: SynthHub's hosted MCP server knows the Yamaha DX7's MIDI map, and its browser relay lets the agent send it parameter changes or load a sound, each sound change confirmed by you.