Rhodes Chroma 2: MIDI CC, NRPN and OSC map¶
The Rhodes Chroma 2 as named OSC addresses — 158 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Rhodes Chroma 2 |
|---|---|
| Vendor | Rhodes |
| OSC prefix | /chroma_2 |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per Electra preset |
| Upstream | electra-preset |
| Driver file | devices/rhodes/chroma_2.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/rhodes/chroma_2.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 chroma_2: ask “what can the Rhodes Chroma 2 do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (158)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/chroma_2/tune |
30 | 0–63 | continuous | ||
/chroma_2/wave_shape |
37 | 0–127 | continuous | ||
/chroma_2/mod_select |
39 | 0–127 | continuous | ||
/chroma_2/tune |
90 | 0–63 | continuous | ||
/chroma_2/wave_shape |
97 | 0–127 | continuous | ||
/chroma_2/mod_select |
99 | 0–127 | continuous | ||
/chroma_2/width |
38 | 0–63 | continuous | ||
/chroma_2/mod_depth |
40 | -64–63 | continuous | ||
/chroma_2/width |
98 | 0–63 | continuous | ||
/chroma_2/mod_depth |
100 | -64–63 | continuous | ||
/chroma_2/mod1_select |
31 | 0–127 | continuous | ||
/chroma_2/mod2_select |
33 | 0–127 | continuous | ||
/chroma_2/mod3_select |
35 | 0–127 | continuous | ||
/chroma_2/mod1_select |
91 | 0–127 | continuous | ||
/chroma_2/mod2_select |
93 | 0–127 | continuous | ||
/chroma_2/mod3_select |
95 | 0–127 | continuous | ||
/chroma_2/mod1_depth |
32 | -64–63 | continuous | ||
/chroma_2/mod2_depth |
34 | -64–63 | continuous | ||
/chroma_2/mod3_depth |
36 | -64–63 | continuous | ||
/chroma_2/mod1_depth |
92 | -64–63 | continuous | ||
/chroma_2/mod2_depth |
94 | -64–63 | continuous | ||
/chroma_2/mod3_depth |
96 | -64–63 | continuous | ||
/chroma_2/rate |
10 | 0–31 | continuous | ||
/chroma_2/shape |
11 | 0–127 | continuous | ||
/chroma_2/rate |
70 | 0–31 | continuous | ||
/chroma_2/shape |
71 | 0–127 | continuous | ||
/chroma_2/patch |
115 | 0–127 | continuous | ||
/chroma_2/key_algorithm |
117 | 0–127 | continuous | ||
/chroma_2/detune |
118 | 0–31 | continuous | ||
/chroma_2/footsw_mode |
116 | 0–127 | continuous | ||
/chroma_2/output_select |
119 | 0–127 | continuous | ||
/chroma_2/type |
41 | 0–127 | continuous | ||
/chroma_2/resonance |
42 | 0–7 | continuous | ||
/chroma_2/tune |
43 | 0–63 | continuous | ||
/chroma_2/type |
101 | 0–127 | continuous | ||
/chroma_2/resonance |
102 | 0–7 | continuous | ||
/chroma_2/tune |
103 | 0–63 | continuous | ||
/chroma_2/mod1_select |
44 | 0–127 | continuous | ||
/chroma_2/mod2_select |
46 | 0–127 | continuous | ||
/chroma_2/mod3_select |
48 | 0–127 | continuous | ||
/chroma_2/mod1_select |
104 | 0–127 | continuous | ||
/chroma_2/mod2_select |
106 | 0–127 | continuous | ||
/chroma_2/mod3_select |
108 | 0–127 | continuous | ||
/chroma_2/mod1_depth |
45 | -64–63 | continuous | ||
/chroma_2/mod2_depth |
47 | -64–63 | continuous | ||
/chroma_2/mod3_depth |
49 | -64–63 | continuous | ||
/chroma_2/mod1_depth |
105 | -64–63 | continuous | ||
/chroma_2/mod2_depth |
107 | -64–63 | continuous | ||
/chroma_2/mod3_depth |
109 | -64–63 | continuous | ||
/chroma_2/mod1_select |
50 | 0–127 | continuous | ||
/chroma_2/mod2_select |
52 | 0–127 | continuous | ||
/chroma_2/mod3_select |
54 | 0–127 | continuous | ||
/chroma_2/mod1_select |
110 | 0–127 | continuous | ||
/chroma_2/mod2_select |
112 | 0–127 | continuous | ||
/chroma_2/mod3_select |
114 | 0–127 | continuous | ||
/chroma_2/mod1_depth |
51 | 0–15 | continuous | ||
/chroma_2/mod2_depth |
53 | 0–15 | continuous | ||
/chroma_2/mod1_depth |
111 | 0–15 | continuous | ||
/chroma_2/mod2_depth |
113 | 0–15 | continuous | ||
/chroma_2/attack |
18 | 0–31 | continuous | ||
/chroma_2/attack_mod |
19 | 0–127 | continuous | ||
/chroma_2/ampl_touch |
17 | 0–127 | continuous | ||
/chroma_2/attack |
78 | 0–31 | continuous | ||
/chroma_2/attack_mod |
79 | 0–127 | continuous | ||
/chroma_2/ampl_touch |
77 | 0–127 | continuous | ||
/chroma_2/decay |
20 | 0–31 | continuous | ||
/chroma_2/decay_mod |
21 | 0–127 | continuous | ||
/chroma_2/release |
22 | 0–31 | continuous | ||
/chroma_2/decay |
80 | 0–31 | continuous | ||
/chroma_2/decay_mod |
81 | 0–127 | continuous | ||
/chroma_2/release |
82 | 0–31 | continuous | ||
/chroma_2/delay |
23 | 0–31 | continuous | ||
/chroma_2/env_2a |
25 | 0–31 | continuous | ||
/chroma_2/env_2a |
27 | 0–31 | continuous | ||
/chroma_2/env_2a |
29 | 0–31 | continuous | ||
/chroma_2/delay |
83 | 0–31 | continuous | ||
/chroma_2/env_2b |
85 | 0–31 | continuous | ||
/chroma_2/env_2b |
87 | 0–31 | continuous | ||
/chroma_2/env_2b |
89 | 0–31 | continuous | ||
/chroma_2/attack_mod |
26 | 0–127 | continuous | ||
/chroma_2/ampl_touch |
24 | 0–127 | continuous | ||
/chroma_2/attack_mod |
86 | 0–127 | continuous | ||
/chroma_2/ampl_touch |
84 | 0–127 | continuous | ||
/chroma_2/decay_mod |
28 | 0–127 | continuous | ||
/chroma_2/decay_mod |
88 | 0–127 | continuous | ||
/chroma_2/mode |
12 | 0–127 | continuous | ||
/chroma_2/rate |
13 | 0–63 | continuous | ||
/chroma_2/rate_mod |
14 | 0–127 | continuous | ||
/chroma_2/mode |
72 | 0–127 | continuous | ||
/chroma_2/rate |
73 | 0–63 | continuous | ||
/chroma_2/rate_mod |
74 | 0–127 | continuous | ||
/chroma_2/wave_shape |
15 | 0–127 | continuous | ||
/chroma_2/ampl_mod |
16 | 0–127 | continuous | ||
/chroma_2/wave_shape |
75 | 0–127 | continuous | ||
/chroma_2/ampl_mod |
76 | 0–127 | continuous | ||
/chroma_2/waveshape |
37 | 0–127 | continuous | ||
/chroma_2/waveshape |
97 | 0–127 | continuous | ||
/chroma_2/mod_select_1 |
31 | 0–127 | continuous | ||
/chroma_2/mod_select_2 |
33 | 0–127 | continuous | ||
/chroma_2/mod_select_3 |
35 | 0–127 | continuous | ||
/chroma_2/mod_select_1 |
91 | 0–127 | continuous | ||
/chroma_2/mod_select_2 |
93 | 0–127 | continuous | ||
/chroma_2/mod_select_3 |
95 | 0–127 | continuous | ||
/chroma_2/mod_depth_1 |
32 | -64–63 | continuous | ||
/chroma_2/mod_depth_2 |
34 | -64–63 | continuous | ||
/chroma_2/mod_depth_3 |
36 | -64–63 | continuous | ||
/chroma_2/mod_depth_1 |
92 | -64–63 | continuous | ||
/chroma_2/mod_depth_2 |
94 | -64–63 | continuous | ||
/chroma_2/mod_depth_3 |
96 | -64–63 | continuous | ||
/chroma_2/glide_shape |
11 | 0–127 | continuous | ||
/chroma_2/glide_rate |
10 | 0–31 | continuous | ||
/chroma_2/glide_shape |
71 | 0–127 | continuous | ||
/chroma_2/glide_rate |
70 | 0–31 | continuous | ||
/chroma_2/cutoff |
43 | 0–63 | continuous | ||
/chroma_2/filter_type |
41 | 0–127 | continuous | ||
/chroma_2/cutoff |
103 | 0–63 | continuous | ||
/chroma_2/filter_type |
101 | 0–127 | continuous | ||
/chroma_2/mod_select_1 |
44 | 0–127 | continuous | ||
/chroma_2/mod_select_2 |
46 | 0–127 | continuous | ||
/chroma_2/mod_select_3 |
48 | 0–127 | continuous | ||
/chroma_2/mod_select_1 |
104 | 0–127 | continuous | ||
/chroma_2/mod_select_2 |
106 | 0–127 | continuous | ||
/chroma_2/mod_select_3 |
108 | 0–127 | continuous | ||
/chroma_2/mod_depth_1 |
45 | -64–63 | continuous | ||
/chroma_2/mod_depth_2 |
47 | -64–63 | continuous | ||
/chroma_2/mod_depth_3 |
49 | -64–63 | continuous | ||
/chroma_2/mod_depth_1 |
105 | -64–63 | continuous | ||
/chroma_2/mod_depth_2 |
107 | -64–63 | continuous | ||
/chroma_2/mod_depth_3 |
109 | -64–63 | continuous | ||
/chroma_2/mod_select_1 |
50 | 0–127 | continuous | ||
/chroma_2/mod_select_2 |
52 | 0–127 | continuous | ||
/chroma_2/mod_select_3 |
54 | 0–127 | continuous | ||
/chroma_2/mod_select_1 |
110 | 0–127 | continuous | ||
/chroma_2/mod_select_2 |
112 | 0–127 | continuous | ||
/chroma_2/mod_select_3 |
114 | 0–127 | continuous | ||
/chroma_2/mod_depth_1 |
51 | 0–15 | continuous | ||
/chroma_2/mod_depth_2 |
53 | 0–15 | continuous | ||
/chroma_2/mod_depth_1 |
111 | 0–15 | continuous | ||
/chroma_2/mod_depth_2 |
113 | 0–15 | continuous | ||
/chroma_2/env_1a_attack |
18 | 0–31 | continuous | ||
/chroma_2/env_1a_decay |
20 | 0–31 | continuous | ||
/chroma_2/env_1a_release |
22 | 0–31 | continuous | ||
/chroma_2/env_1b_attack |
78 | 0–31 | continuous | ||
/chroma_2/env_1b_decay |
80 | 0–31 | continuous | ||
/chroma_2/env_1b_release |
82 | 0–31 | continuous | ||
/chroma_2/env_2a_attack |
25 | 0–31 | continuous | ||
/chroma_2/env_2a_decay |
27 | 0–31 | continuous | ||
/chroma_2/env_2a_release |
29 | 0–31 | continuous | ||
/chroma_2/env_2b_attack |
85 | 0–31 | continuous | ||
/chroma_2/env_2b_decay |
87 | 0–31 | continuous | ||
/chroma_2/env_2b_release |
89 | 0–31 | continuous | ||
/chroma_2/sweep_shape |
15 | 0–127 | continuous | ||
/chroma_2/sweep_shape |
75 | 0–127 | continuous | ||
/chroma_2/sweep_rate_mod_b |
74 | 0–127 | continuous | ||
/chroma_2/env_2a_delay |
23 | 0–31 | continuous | ||
/chroma_2/env_2b_delay |
83 | 0–31 | continuous | ||
/chroma_2/sweep_a_mode |
12 | 0–127 | continuous | ||
/chroma_2/sweep_b_mode |
72 | 0–127 | continuous |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /chroma_2/note/on <note> <velocity>, /chroma_2/cc/<number> <value>, /chroma_2/pitchbend <0-16383>, /chroma_2/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.