Cherry Audio PS-20 MIDI CC chart, NRPN and OSC map¶
The Cherry Audio PS-20 MIDI implementation: 100 CC, each named, for Claude (MCP), SuperCollider or any OSC app.
| Device | Cherry Audio PS-20 |
|---|---|
| Vendor | Cherry Audio |
| OSC prefix | /ps_20 |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per Electra preset |
| Upstream | electra-preset |
| Driver file | devices/cherry-audio/ps_20.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/cherry-audio/ps_20.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 ps_20: ask “what can the Cherry Audio PS-20 do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (100)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/ps_20/wave_form |
1 | 0–127 | continuous | ||
/ps_20/pw |
2 | 0–127 | continuous | ||
/ps_20/scale |
3 | 0–127 | continuous | ||
/ps_20/sub_osc |
4 | 0–127 | continuous | ||
/ps_20/pwm_mg_pp |
5 | 0–127 | continuous | ||
/ps_20/sync |
6 | 0–127 | continuous | ||
/ps_20/wave_form |
8 | 0–127 | continuous | ||
/ps_20/pw |
9 | 0–127 | continuous | ||
/ps_20/scale |
10 | 0–127 | continuous | ||
/ps_20/pitch |
11 | 0–127 | continuous | ||
/ps_20/pwm_mg_pp |
12 | 0–127 | continuous | ||
/ps_20/keyb_cv |
13 | 0–127 | continuous | ||
/ps_20/vco_1_level |
14 | 0–127 | continuous | ||
/ps_20/vco_2_level |
15 | 0–127 | continuous | ||
/ps_20/noise |
16 | 0–127 | continuous | ||
/ps_20/master_tune |
17 | 0–127 | continuous | ||
/ps_20/bend_depth |
18 | 0–127 | continuous | ||
/ps_20/portamento |
19 | 0–127 | continuous | ||
/ps_20/ext_sc_level |
20 | 0–127 | continuous | ||
/ps_20/mix_att_in_1 |
21 | 0–127 | continuous | ||
/ps_20/mix_att_in_2 |
22 | 0–127 | continuous | ||
/ps_20/volume |
7 | 0–127 | continuous | ||
/ps_20/vco_1_2_mg |
23 | 0–127 | continuous | ||
/ps_20/vco_1_eg1 |
24 | 0–127 | continuous | ||
/ps_20/vco_2_eg1 |
25 | 0–127 | continuous | ||
/ps_20/vca_mod |
26 | 0–127 | continuous | ||
/ps_20/sync |
27 | 0–127 | continuous | ||
/ps_20/mod_wheel |
28 | 0–127 | continuous | ||
/ps_20/wave_form |
29 | 0–127 | continuous | ||
/ps_20/frequency |
30 | 0–127 | continuous | ||
/ps_20/cutoff_freq |
32 | 0–127 | continuous | ||
/ps_20/peak |
33 | 0–127 | continuous | ||
/ps_20/drive |
34 | 0–127 | continuous | ||
/ps_20/keyb_trk |
35 | 0–127 | continuous | ||
/ps_20/mg_lfo |
36 | 0–127 | continuous | ||
/ps_20/eg2_patch_p |
37 | 0–127 | continuous | ||
/ps_20/cutoff_freq |
38 | 0–127 | continuous | ||
/ps_20/peak |
39 | 0–127 | continuous | ||
/ps_20/drive |
40 | 0–127 | continuous | ||
/ps_20/keyb_trk |
41 | 0–127 | continuous | ||
/ps_20/mg_lfo |
42 | 0–127 | continuous | ||
/ps_20/eg2_patch_p |
43 | 0–127 | continuous | ||
/ps_20/path |
44 | 0–127 | continuous | ||
/ps_20/delay_time |
45 | 0–127 | continuous | ||
/ps_20/attack |
46 | 0–127 | continuous | ||
/ps_20/attack |
0 | 0–127 | continuous | ||
/ps_20/attack |
47 | 0–127 | continuous | ||
/ps_20/sustain |
48 | 0–127 | continuous | ||
/ps_20/velocity_amt |
49 | 0–127 | continuous | ||
/ps_20/hold_time |
50 | 0–127 | continuous | ||
/ps_20/attack |
51 | 0–127 | continuous | ||
/ps_20/attack |
52 | 0–127 | continuous | ||
/ps_20/attack |
53 | 0–127 | continuous | ||
/ps_20/attack |
54 | 0–127 | continuous | ||
/ps_20/velocity_amt |
55 | 0–127 | continuous | ||
/ps_20/1 |
56 | 0–127 | continuous | ||
/ps_20/2 |
57 | 0–127 | continuous | ||
/ps_20/3 |
58 | 0–127 | continuous | ||
/ps_20/4 |
59 | 0–127 | continuous | ||
/ps_20/sync |
65 | 0–127 | continuous | ||
/ps_20/rate |
66 | 0–127 | continuous | ||
/ps_20/5 |
60 | 0–127 | continuous | ||
/ps_20/6 |
61 | 0–127 | continuous | ||
/ps_20/7 |
62 | 0–127 | continuous | ||
/ps_20/8 |
63 | 0–127 | continuous | ||
/ps_20/ext_step |
64 | 0–127 | continuous | ||
/ps_20/cv_select |
68 | 0–127 | continuous | ||
/ps_20/quantize_1_2_3 |
69 | 0–127 | continuous | ||
/ps_20/range |
70 | 0–127 | continuous | ||
/ps_20/gate_length |
71 | 0–127 | continuous | ||
/ps_20/start_stop |
72 | 0–127 | continuous | ||
/ps_20/num_of_steps |
73 | 0–127 | continuous | ||
/ps_20/signal_level |
74 | 0–127 | continuous | ||
/ps_20/low_cut_freq |
75 | 0–127 | continuous | ||
/ps_20/high_cut_freq |
76 | 0–127 | continuous | ||
/ps_20/cv_amt |
77 | 0–127 | continuous | ||
/ps_20/threshold_lvl |
78 | 0–127 | continuous | ||
/ps_20/up_max_v |
79 | 0–127 | continuous | ||
/ps_20/chord |
80 | 0–127 | continuous | ||
/ps_20/random_pan |
81 | 0–127 | continuous | ||
/ps_20/detune |
82 | 0–127 | continuous | ||
/ps_20/stereo_spread |
83 | 0–127 | continuous | ||
/ps_20/trig_mode |
84 | 0–127 | continuous | ||
/ps_20/down_max_v |
85 | 0–127 | continuous | ||
/ps_20/reverb |
86 | 0–127 | continuous | ||
/ps_20/type |
87 | 0–127 | continuous | ||
/ps_20/decay |
88 | 0–127 | continuous | ||
/ps_20/damp |
89 | 0–127 | continuous | ||
/ps_20/amount |
90 | 0–127 | continuous | ||
/ps_20/distortion |
91 | 0–127 | continuous | ||
/ps_20/dist |
92 | 0–127 | continuous | ||
/ps_20/delay |
93 | 0–127 | continuous | ||
/ps_20/feedback |
94 | 0–127 | continuous | ||
/ps_20/dampen |
95 | 0–127 | continuous | ||
/ps_20/mod_rate |
96 | 0–127 | continuous | ||
/ps_20/mod_depth |
97 | 0–127 | continuous | ||
/ps_20/amount |
102 | 0–127 | continuous | ||
/ps_20/sync |
98 | 0–127 | continuous | ||
/ps_20/time |
100 | 0–127 | continuous | ||
/ps_20/spread |
101 | 0–127 | continuous |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /ps_20/note/on <note> <velocity>, /ps_20/cc/<number> <value>, /ps_20/pitchbend <0-16383>, /ps_20/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¶
Which MIDI CC controls the filter cutoff on the Cherry Audio PS-20?
CC 32 (0–127), named /ps_20/cutoff_freq in SynthHub's map.
How many parameters of the Cherry Audio PS-20 can be controlled over MIDI?
SynthHub's map of the Cherry Audio PS-20 lists 100 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 Cherry Audio PS-20?
Yes: SynthHub's hosted MCP server knows the Cherry Audio PS-20's MIDI map, and its browser relay lets the agent send it parameter changes or load a sound, each sound change confirmed by you.