Hologram CHROMA: MIDI CC, NRPN and OSC map¶
The Hologram CHROMA as named OSC addresses — 31 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Hologram CHROMA |
|---|---|
| Vendor | Hologram |
| OSC prefix | /chroma |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per Electra preset |
| Upstream | electra-preset |
| Driver file | devices/hologram/chroma.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/hologram/chroma.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: ask “what can the Hologram CHROMA do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (31)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/chroma/tilt |
64 | 0–127 | continuous | ||
/chroma/amount |
65 | 0–127 | continuous | ||
/chroma/vol |
73 | 0–127 | continuous | ||
/chroma/character |
16 | 0–127 | continuous | ||
/chroma/engage |
103 | 0–127 | continuous | ||
/chroma/bypass |
91 | 0–127 | continuous | ||
/chroma/rate |
66 | 0–127 | continuous | ||
/chroma/amount |
67 | 0–127 | continuous | ||
/chroma/vol |
75 | 0–127 | continuous | ||
/chroma/movement |
17 | 0–127 | continuous | ||
/chroma/engage |
104 | 0–127 | continuous | ||
/chroma/drift |
74 | 0–127 | continuous | ||
/chroma/time |
68 | 0–127 | continuous | ||
/chroma/amount |
69 | 0–127 | continuous | ||
/chroma/vol |
77 | 0–127 | continuous | ||
/chroma/diffusion |
18 | 0–127 | continuous | ||
/chroma/engage |
105 | 0–127 | continuous | ||
/chroma/drift |
76 | 0–127 | continuous | ||
/chroma/mix |
70 | 0–127 | continuous | ||
/chroma/amount |
71 | 0–127 | continuous | ||
/chroma/vol |
79 | 0–127 | continuous | ||
/chroma/texture |
19 | 0–127 | continuous | ||
/chroma/engage |
106 | 0–127 | continuous | ||
/chroma/dual_bypass |
92 | 0–127 | continuous | ||
/chroma/sensitivity |
72 | 0–127 | continuous | ||
/chroma/menu_enter |
95 | 0–127 | continuous | ||
/chroma/level |
84 | 0–127 | continuous | ||
/chroma/level |
78 | 0–127 | continuous | ||
/chroma/play_rec |
80 | 0–127 | continuous | ||
/chroma/stop_erase |
81 | 0–127 | continuous | ||
/chroma/capture |
82 | 0–127 | continuous |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /chroma/note/on <note> <velocity>, /chroma/cc/<number> <value>, /chroma/pitchbend <0-16383>, /chroma/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.