Empress Reverb: MIDI CC, NRPN and OSC map¶
The Empress Reverb as named OSC addresses — 59 CC — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Empress Reverb |
|---|---|
| Vendor | Empress |
| OSC prefix | /reverb |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per pencilresearch canonical CSV |
| Upstream | electra-preset |
| Driver file | devices/empress/reverb.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/empress/reverb.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 reverb: ask “what can the Empress Reverb do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (59)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/reverb/simulate_exp |
10 | 0–127 | continuous | ||
/reverb/load_preset |
11 | 0–127 | continuous | ||
/reverb/mode |
20 | 0–127 | continuous | ||
/reverb/decay_time |
21 | 0–127 | continuous | ||
/reverb/mix |
22 | 0–127 | continuous | ||
/reverb/volume |
23 | 0–127 | continuous | ||
/reverb/low |
24 | 0–127 | continuous | ||
/reverb/hi |
25 | 0–127 | continuous | ||
/reverb/thing1 |
26 | 0–127 | continuous | ||
/reverb/thing2 |
27 | 0–127 | continuous | ||
/reverb/select_btn |
35 | 0–127 | continuous | ||
/reverb/scroll_btn |
36 | 0–127 | continuous | ||
/reverb/bypass_btn |
37 | 0–127 | continuous | ||
/reverb/save_btn |
38 | 0–127 | continuous | ||
/reverb/save_preset |
39 | 0–127 | continuous | ||
/reverb/midi_clock |
51 | 0–127 | continuous | ||
/reverb/engage_bypass |
60 | 0–127 | continuous | ||
/reverb/reverb_type |
20 | 0–127 | continuous | ||
/reverb/low_damping |
24 | 0–127 | continuous | ||
/reverb/hi_damping |
25 | 0–127 | continuous | ||
/reverb/save_button |
38 | 0–127 | continuous | ||
/reverb/synced |
51 | 0–127 | continuous | ||
/reverb/bypass_switch |
37 | 0–127 | continuous | ||
/reverb/select_switch |
35 | 0–127 | continuous | ||
/reverb/scroll_switch |
36 | 0–127 | continuous | ||
/reverb/activate_pedal |
60 | 0–127 | continuous | ||
/reverb/lowcut |
30 | 0–127 | continuous | ||
/reverb/high_cut |
29 | 0–127 | continuous | ||
/reverb/er_spin |
24 | 0–127 | continuous | ||
/reverb/shape |
7 / 39 | 0–100 | continuous | ||
/reverb/reflect |
6 / 38 | 0–16383 | continuous | ||
/reverb/diffuse_level |
3 / 35 | 0–16383 | continuous | ||
/reverb/frequency |
12 / 44 | 0–16383 | continuous | ||
/reverb/width |
13 / 45 | 50–900 | continuous | ||
/reverb/spin_amount |
8 / 40 | 20–550 | continuous | ||
/reverb/spin_rate |
9 / 41 | 0–16383 | continuous | ||
/reverb/dry_wet |
5 / 37 | 0–1000 | continuous | ||
/reverb/hifilter |
27 | 0–127 | continuous | ||
/reverb/hifilter_type |
28 | 0–127 | continuous | ||
/reverb/hifilter_freq |
10 / 42 | 0–16383 | continuous | ||
/reverb/hishelf_gain |
11 / 43 | 20–100 | continuous | ||
/reverb/chorus |
20 | 0–127 | continuous | ||
/reverb/chorus_amount |
0 / 32 | 1–400 | continuous | ||
/reverb/lowshelf |
31 | 0–127 | continuous | ||
/reverb/lowshelf_freq |
14 / 46 | 0–16383 | continuous | ||
/reverb/lowshelf_gain |
15 / 47 | 20–100 | continuous | ||
/reverb/diffusion |
4 / 36 | 1–960 | continuous | ||
/reverb/scale |
18 / 50 | 50–1000 | continuous | ||
/reverb/chorus_rate |
1 / 33 | 0–16383 | continuous | ||
/reverb/predelay |
16 / 48 | 0–16383 | continuous | ||
/reverb/size_smoothing |
52 | 0–127 | continuous | ||
/reverb/decaytime |
2 / 34 | 0–16383 | continuous | ||
/reverb/freeze |
26 | 0–127 | continuous | ||
/reverb/stereo_image |
19 / 51 | 0–1200 | continuous | ||
/reverb/room_size |
17 / 49 | 2–5000 | continuous | ||
/reverb/flat |
25 | 0–127 | continuous | ||
/reverb/cut |
21 | 0–127 | continuous | ||
/reverb/density |
22 | 0–127 | continuous | ||
/reverb/device_on |
23 | 0–127 | continuous |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /reverb/note/on <note> <velocity>, /reverb/cc/<number> <value>, /reverb/pitchbend <0-16383>, /reverb/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.