Tubbutec Juno-66 MIDI CC chart, NRPN and OSC map¶
The Tubbutec Juno-66 MIDI implementation: 27 CC, each named, for Claude (MCP), SuperCollider or any OSC app.
| Device | Tubbutec Juno-66 |
|---|---|
| Vendor | Tubbutec |
| OSC prefix | /juno_66 |
| 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/tubbutec/juno_66.pencilresearch.fw-unknown.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/tubbutec/juno_66.pencilresearch.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 juno_66: ask “what can the Tubbutec Juno-66 do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (27)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/juno_66/arp/midi_clock_divider |
16 | 0–127 | continuous | Arp | |
/juno_66/filter/cutoff |
17 | 0–127 | continuous | Filter | |
/juno_66/lfo/s_h_lfo_amount |
18 | 0–127 | continuous | LFO | |
/juno_66/lfo/s_h_lfo_divider |
19 | 0–127 | continuous | LFO | |
/juno_66/arp/clock_divider |
20 | 0–127 | continuous | Arp | |
/juno_66/cv/cv2_if_installed |
21 | 0–127 | continuous | CV | |
/juno_66/cv/cv3_if_installed |
22 | 0–127 | continuous | CV | |
/juno_66/lfo/tri_lfo_frequency_coarse |
23 | 0–127 | continuous | LFO | |
/juno_66/lfo/tri_lfo_frequency_fine |
24 | 0–127 | continuous | LFO | |
/juno_66/lfo/tri_lfo_amount |
25 | 0–127 | continuous | LFO | |
/juno_66/osc/detune_amount |
26 | 0–127 | continuous | Osc | |
/juno_66/osc/fatness_amount |
27 | 0–127 | continuous | Osc | |
/juno_66/portamento/speed_fast |
28 | 0–127 | continuous | Portamento | |
/juno_66/portamento/speed_slow |
29 | 0–127 | continuous | Portamento | |
/juno_66/filter_adsr/attack |
30 | 0–127 | continuous | Filter ADSR | |
/juno_66/filter_adsr/decay |
31 | 0–127 | continuous | Filter ADSR | |
/juno_66/filter_adsr/sustain |
32 | 0–127 | continuous | Filter ADSR | |
/juno_66/filter_adsr/release |
33 | 0–127 | continuous | Filter ADSR | |
/juno_66/filter_adsr/amount |
34 | 0–127 | continuous | Filter ADSR | |
/juno_66/seq/seq_clock_source |
35 | 0–127 | continuous | Seq | |
/juno_66/lfo/s_h_clock_source |
36 | 0–127 | continuous | LFO | |
/juno_66/filter_adsr/delay |
37 | 0–127 | continuous | Filter ADSR | |
/juno_66/filter_adsr/looping |
38 | 0–127 | continuous | Filter ADSR | |
/juno_66/filter_adsr/polarity_inversion |
39 | 0–127 | continuous | Filter ADSR | |
/juno_66/global/sustain_pedal |
64 | 0–127 | continuous | Global | |
/juno_66/global/all_sound_off |
120 | 0–127 | continuous | Global | |
/juno_66/global/all_notes_off |
123 | 0–127 | continuous | Global |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /juno_66/note/on <note> <velocity>, /juno_66/cc/<number> <value>, /juno_66/pitchbend <0-16383>, /juno_66/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.
Frequently asked questions¶
Which MIDI CC controls the filter cutoff on the Tubbutec Juno-66?
CC 17 (0–127), named /juno_66/filter/cutoff in SynthHub's map.
How many parameters of the Tubbutec Juno-66 can be controlled over MIDI?
SynthHub's map of the Tubbutec Juno-66 lists 27 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 Tubbutec Juno-66?
Yes: SynthHub's hosted MCP server knows the Tubbutec Juno-66's MIDI map, and its browser relay lets the agent send it parameter changes or load a sound, each sound change confirmed by you.