Access Virus Rack: MIDI CC, NRPN and OSC map¶
The Access Virus Rack as named OSC addresses — 3 CC, 111 SysEx commands — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Access Virus Rack |
|---|---|
| Vendor | Access |
| OSC prefix | /virus_rack |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per Electra preset |
| Upstream | electra-preset |
| Driver file | devices/access/virus_rack.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/access/virus_rack.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 virus_rack: ask “what can the Access Virus Rack do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (3)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/virus_rack/source |
23 | 0–127 | continuous | ||
/virus_rack/room_size_r |
117 | 0–127 | continuous | ||
/virus_rack/damping_r |
118 | 0–127 | continuous |
SysEx commands (111)¶
| OSC address | Arguments |
|---|---|
/virus_rack/cutoff |
val: u7 |
/virus_rack/filter_type |
val: u7 |
/virus_rack/wave_type |
val: u7 |
/virus_rack/resonance |
val: u7 |
/virus_rack/osc2_semitone |
val: u7 |
/virus_rack/wave_shape |
val: u7 |
/virus_rack/osc2_detune |
val: u7 |
/virus_rack/routing |
val: u7 |
/virus_rack/osc_bal |
val: u7 |
/virus_rack/sub_osc |
val: u7 |
/virus_rack/osc_vol |
val: u7 |
/virus_rack/noise |
val: u7 |
/virus_rack/filt_bal |
val: u7 |
/virus_rack/efx_mode |
val: u7 |
/virus_rack/efx_send |
val: u7 |
/virus_rack/chorus |
val: u7 |
/virus_rack/phaser |
val: u7 |
/virus_rack/rate |
val: u7 |
/virus_rack/attack |
val: u7 |
/virus_rack/decay |
val: u7 |
/virus_rack/sustain |
val: u7 |
/virus_rack/release |
val: u7 |
/virus_rack/pulse_width |
val: u7 |
/virus_rack/1_bal_2 |
val: u7 |
/virus_rack/semitone |
val: u7 |
/virus_rack/osc_init_phase |
val: u7 |
/virus_rack/1_sync_2 |
val: u7 |
/virus_rack/vol |
val: u7 |
/virus_rack/color |
val: u7 |
/virus_rack/detune |
val: u7 |
/virus_rack/key_follow |
val: u7 |
/virus_rack/input_mix |
val: u7 |
/virus_rack/sub_osc_vol |
val: u7 |
/virus_rack/intensity |
val: u7 |
/virus_rack/1_fm_2 |
val: u7 |
/virus_rack/fil_env_fm |
val: u7 |
/virus_rack/fil_env_ptch |
val: u7 |
/virus_rack/osc1_shape |
val: u7 |
/virus_rack/amp |
val: u7 |
/virus_rack/fm_amount |
val: u7 |
/virus_rack/pan |
val: u7 |
/virus_rack/osc2_shape |
val: u7 |
/virus_rack/amp_env |
val: u7 |
/virus_rack/filter_env |
val: u7 |
/virus_rack/sustain_decay |
val: u7 |
/virus_rack/env_amount |
val: u7 |
/virus_rack/1_cutoff_2 |
val: u7 |
/virus_rack/env_polarity |
val: u7 |
/virus_rack/key_base |
val: u7 |
/virus_rack/curve |
val: u7 |
/virus_rack/mode |
val: u7 |
/virus_rack/pan_spread |
val: u7 |
/virus_rack/lfo_phase |
val: u7 |
/virus_rack/clock |
val: u7 |
/virus_rack/mono |
val: u7 |
/virus_rack/filter_gain |
val: u7 |
/virus_rack/contour |
val: u7 |
/virus_rack/env_mode |
val: u7 |
/virus_rack/key_trig_phase |
val: u7 |
/virus_rack/fade_in |
val: u7 |
/virus_rack/lfo1_osc1 |
val: u7 |
/virus_rack/lfo1_osc2 |
val: u7 |
/virus_rack/source |
val: u7 |
/virus_rack/destination |
val: u7 |
/virus_rack/pw_osc1_2 |
val: u7 |
/virus_rack/res_osc1_2 |
val: u7 |
/virus_rack/amount |
val: u7 |
/virus_rack/lfo2_fil1 |
val: u7 |
/virus_rack/lfo2_fil2 |
val: u7 |
/virus_rack/dest_1 |
val: u7 |
/virus_rack/dest_2 |
val: u7 |
/virus_rack/shape_osc1_2 |
val: u7 |
/virus_rack/amount_1 |
val: u7 |
/virus_rack/amount_2 |
val: u7 |
/virus_rack/dest_3 |
val: u7 |
/virus_rack/amount_3 |
val: u7 |
/virus_rack/depth_d |
val: u7 |
/virus_rack/feedback |
val: u7 |
/virus_rack/predelay_r |
val: u7 |
/virus_rack/lfo_shape_d |
val: u7 |
/virus_rack/depth |
val: u7 |
/virus_rack/lfo_shape |
val: u7 |
/virus_rack/delay_time |
val: u7 |
/virus_rack/stages |
val: u7 |
/virus_rack/tune |
val: u7 |
/virus_rack/freq |
val: u7 |
/virus_rack/spread |
val: u7 |
/virus_rack/global_bpm |
val: u7 |
/virus_rack/pattern |
val: u7 |
/virus_rack/note_length |
val: u7 |
/virus_rack/hold |
val: u7 |
/virus_rack/octave_range |
val: u7 |
/virus_rack/swing |
val: u7 |
/virus_rack/porta_time |
val: u7 |
/virus_rack/transpose |
val: u7 |
/virus_rack/input_plug |
val: u7 |
/virus_rack/direct_thru |
val: u7 |
/virus_rack/boost |
val: u7 |
/virus_rack/key_mode |
val: u7 |
/virus_rack/gain |
val: u7 |
/virus_rack/phono |
val: u7 |
/virus_rack/follower_mode |
val: u7 |
/virus_rack/ringmod_mix |
val: u7 |
/virus_rack/smooth_mode |
val: u7 |
/virus_rack/source_balance |
val: u7 |
/virus_rack/offset |
val: u7 |
/virus_rack/bend_scale |
val: u7 |
/virus_rack/bend_up |
val: u7 |
/virus_rack/spec_balance |
val: u7 |
/virus_rack/q_carrier |
val: u7 |
/virus_rack/bend_down |
val: u7 |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /virus_rack/note/on <note> <velocity>, /virus_rack/cc/<number> <value>, /virus_rack/pitchbend <0-16383>, /virus_rack/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.