Access Virus A: MIDI CC, NRPN and OSC map¶
The Access Virus A as named OSC addresses — 186 CC, 63 SysEx commands — ready to use from Claude (MCP), SuperCollider, Sonic Pi, TouchDesigner or any OSC app via osc-bridge.
| Device | Access Virus A |
|---|---|
| Vendor | Access |
| OSC prefix | /virus_a |
| Source | 🎛️ Derived from an Electra One community preset |
| Revision | per pencilresearch canonical CSV |
| Upstream | electra-preset |
| Driver file | devices/access/virus_a.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_a.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_a: ask “what can the Access Virus A do?” and it reads this map with list_routes. See the MCP guide.
MIDI CC and NRPN parameters (186)¶
| OSC address | CC | NRPN (MSB/LSB) | Range | Nature | Section |
|---|---|---|---|---|---|
/virus_a/general/modulation_wheel |
1 | 0–127 | continuous | General | |
/virus_a/general/portamento_time |
5 | 0–127 | continuous | General | |
/virus_a/general/channel_volume |
7 | 0–127 | continuous | General | |
/virus_a/general/panorama |
10 | 0–127 | continuous | General | |
/virus_a/oscillators/osc1_shape |
17 | 0–127 | continuous | Oscillators | |
/virus_a/oscillators/osc1_pulsewidth |
18 | 0–127 | continuous | Oscillators | |
/virus_a/oscillators/osc1_wave_select |
19 | 0–64 | continuous | Oscillators | |
/virus_a/oscillators/osc1_semitone |
20 | 0–127 | continuous | Oscillators | |
/virus_a/oscillators/osc1_keyfollow |
21 | 0–127 | continuous | Oscillators | |
/virus_a/oscillators/osc2_shape |
22 | 0–127 | continuous | Oscillators | |
/virus_a/oscillators/osc2_pulsewidth |
23 | 0–127 | continuous | Oscillators | |
/virus_a/oscillators/osc2_wave_select |
24 | 0–64 | continuous | Oscillators | |
/virus_a/oscillators/osc2_semitone |
25 | 0–127 | continuous | Oscillators | |
/virus_a/oscillators/osc2_detune |
26 | 0–127 | continuous | Oscillators | |
/virus_a/oscillators/osc2_fm_amount |
27 | 0–127 | continuous | Oscillators | |
/virus_a/oscillators/osc2_sync |
28 | 0–1 | switch | Oscillators | |
/virus_a/oscillators/osc2_filt_env_amt |
29 | 0–127 | continuous | Oscillators | |
/virus_a/general/fm_filt_env_amt |
30 | 0–127 | continuous | General | |
/virus_a/general/osc2_keyfollow |
31 | 0–127 | continuous | General | |
/virus_a/general/bank_select |
32 | 0–1 | switch | General | |
/virus_a/mix/osc_balance |
33 | 0–127 | continuous | Mix | |
/virus_a/mix/suboscillator_volume |
34 | 0–127 | continuous | Mix | |
/virus_a/oscillators/suboscillator_shape |
35 | 0–1 | switch | Oscillators | |
/virus_a/mix/osc_main_volume |
36 | 0–127 | continuous | Mix | |
/virus_a/mix/noise_volume |
37 | 0–127 | continuous | Mix | |
/virus_a/filter/cutoff |
40 | 0–127 | continuous | Filter | |
/virus_a/filter/cutoff2 |
41 | 0–127 | continuous | Filter | |
/virus_a/filter/filter1_resonance |
42 | 0–127 | continuous | Filter | |
/virus_a/filter/filter2_resonance |
43 | 0–127 | continuous | Filter | |
/virus_a/filter/filter1_env_amt |
44 | 0–127 | continuous | Filter | |
/virus_a/filter/filter2_env_amt |
45 | 0–127 | continuous | Filter | |
/virus_a/filter/filter1_keyfollow |
46 | 0–127 | continuous | Filter | |
/virus_a/filter/filter2_keyfollow |
47 | 0–127 | continuous | Filter | |
/virus_a/filter/balance |
48 | 0–127 | continuous | Filter | |
/virus_a/general/saturation_curve |
49 | 0–6 | continuous | General | |
/virus_a/filter/filter1_mode |
51 | 0–3 | continuous | Filter | |
/virus_a/filter/filter2_mode |
52 | 0–3 | continuous | Filter | |
/virus_a/filter/routing |
53 | 0–3 | continuous | Filter | |
/virus_a/envelopes/filter_env_attack |
54 | 0–127 | continuous | Envelopes | |
/virus_a/envelopes/filter_env_decay |
55 | 0–127 | continuous | Envelopes | |
/virus_a/envelopes/filter_env_sustain |
56 | 0–127 | continuous | Envelopes | |
/virus_a/envelopes/filter_env_sustain_time |
57 | 0–127 | continuous | Envelopes | |
/virus_a/envelopes/filter_env_release |
58 | 0–127 | continuous | Envelopes | |
/virus_a/envelopes/amp_env_attack |
59 | 0–127 | continuous | Envelopes | |
/virus_a/envelopes/amp_env_decay |
60 | 0–127 | continuous | Envelopes | |
/virus_a/envelopes/amp_env_sustain |
61 | 0–127 | continuous | Envelopes | |
/virus_a/envelopes/amp_env_sustain_time |
62 | 0–127 | continuous | Envelopes | |
/virus_a/envelopes/amp_env_release |
63 | 0–127 | continuous | Envelopes | |
/virus_a/general/hold_pedal |
64 | 0–127 | continuous | General | |
/virus_a/lfo/lfo1_rate |
67 | 0–127 | continuous | LFO | |
/virus_a/lfo/lfo1_shape |
68 | 0–5 | continuous | LFO | |
/virus_a/lfo/lfo1_env_mode |
69 | 0–1 | switch | LFO | |
/virus_a/lfo/lfo1_mode |
70 | 0–1 | switch | LFO | |
/virus_a/lfo/lfo1_symmetry |
71 | 0–127 | continuous | LFO | |
/virus_a/lfo/lfo1_keyfollow_amt |
72 | 0–127 | continuous | LFO | |
/virus_a/lfo/osc1_lfo1_amount |
74 | 0–127 | continuous | LFO | |
/virus_a/lfo/osc2_lfo1_amount |
75 | 0–127 | continuous | LFO | |
/virus_a/lfo/pw_lfo1_amount |
76 | 0–127 | continuous | LFO | |
/virus_a/lfo/reso_lfo1_amount |
77 | 0–127 | continuous | LFO | |
/virus_a/lfo/filtgain_lfo1_amount |
78 | 0–127 | continuous | LFO | |
/virus_a/lfo/lfo2_rate |
79 | 0–127 | continuous | LFO | |
/virus_a/lfo/lfo2_shape |
80 | 0–5 | continuous | LFO | |
/virus_a/lfo/lfo2_env_mode |
81 | 0–1 | switch | LFO | |
/virus_a/lfo/lfo2_mode |
82 | 0–1 | switch | LFO | |
/virus_a/lfo/lfo2_symmetry |
83 | 0–127 | continuous | LFO | |
/virus_a/lfo/lfo2_keytrigger |
85 | 0–127 | continuous | LFO | |
/virus_a/lfo/oscshape_lfo2_amount |
86 | 0–127 | continuous | LFO | |
/virus_a/lfo/fmamount_lfo2_amount |
87 | 0–127 | continuous | LFO | |
/virus_a/lfo/cutoff1_lfo2_amount |
88 | 0–127 | continuous | LFO | |
/virus_a/lfo/cutoff2_lfo2_amount |
89 | 0–127 | continuous | LFO | |
/virus_a/lfo/panorama_lfo2_amount |
90 | 0–127 | continuous | LFO | |
/virus_a/general/patch_volume |
91 | 0–127 | continuous | General | |
/virus_a/general/transpose |
93 | 0–127 | continuous | General | |
/virus_a/general/key_mode |
94 | 0–4 | continuous | General | |
/virus_a/general/twin_mode |
97 | 0–1 | switch | General | |
/virus_a/general/twin_detune |
98 | 0–127 | continuous | General | |
/virus_a/general/panorama_spread |
99 | 0–127 | continuous | General | |
/virus_a/lfo/twin_lfo_phase |
100 | 0–127 | continuous | LFO | |
/virus_a/general/input_mode |
101 | 0–2 | continuous | General | |
/virus_a/general/input_select |
102 | 0–8 | continuous | General | |
/virus_a/fx/chorus_mix |
105 | 0–127 | continuous | FX | |
/virus_a/fx/chorus_rate |
106 | 0–127 | continuous | FX | |
/virus_a/fx/chorus_depth |
107 | 0–127 | continuous | FX | |
/virus_a/fx/chorus_delay |
108 | 0–127 | continuous | FX | |
/virus_a/fx/chorus_feedback |
109 | 0–127 | continuous | FX | |
/virus_a/fx/chorus_lfo_shape |
110 | 0–5 | continuous | FX | |
/virus_a/fx/effect_send |
113 | 0–127 | continuous | FX | |
/virus_a/fx/delay_time |
114 | 0–127 | continuous | FX | |
/virus_a/fx/delay_feedback |
115 | 0–127 | continuous | FX | |
/virus_a/fx/delay_rate |
116 | 0–127 | continuous | FX | |
/virus_a/fx/delay_depth |
117 | 0–127 | continuous | FX | |
/virus_a/fx/delay_lfo_shape |
118 | 0–5 | continuous | FX | |
/virus_a/general/all_notes_off |
123 | 0–0 | continuous | General | |
/virus_a/shape |
17 | 0–127 | continuous | ||
/virus_a/wave_type |
19 | 0–127 | continuous | ||
/virus_a/pulse_width |
18 | 0–127 | continuous | ||
/virus_a/semitone |
20 | -64–63 | continuous | ||
/virus_a/key_follow |
21 | -64–63 | continuous | ||
/virus_a/shape |
22 | 0–127 | continuous | ||
/virus_a/wave_type |
24 | 0–127 | continuous | ||
/virus_a/pulse_width |
23 | 0–127 | continuous | ||
/virus_a/semitone |
25 | -64–63 | continuous | ||
/virus_a/key_follow |
31 | -64–63 | continuous | ||
/virus_a/1_fm_2 |
27 | 0–127 | continuous | ||
/virus_a/1_sync_2 |
28 | 0–127 | continuous | ||
/virus_a/fil_env_ptch |
29 | -64–63 | continuous | ||
/virus_a/fil_env_fm |
30 | -64–63 | continuous | ||
/virus_a/detune |
26 | 0–127 | continuous | ||
/virus_a/vol |
37 | 0–127 | continuous | ||
/virus_a/color |
39 | -64–63 | continuous | ||
/virus_a/shape |
35 | 0–127 | continuous | ||
/virus_a/mode |
97 | 0–15 | continuous | ||
/virus_a/detune |
98 | 0–127 | continuous | ||
/virus_a/pan_spread |
99 | 0–127 | continuous | ||
/virus_a/lfo_phase |
100 | -64–63 | continuous | ||
/virus_a/1_bal_2 |
33 | -64–63 | continuous | ||
/virus_a/sub_osc_vol |
34 | 0–128 | continuous | ||
/virus_a/oscs_vol |
36 | -64–63 | continuous | ||
/virus_a/filter_mode |
51 | 0–127 | continuous | ||
/virus_a/cutoff |
40 | 0–127 | continuous | ||
/virus_a/resonance |
42 | 0–127 | continuous | ||
/virus_a/env_amount |
44 | 0–127 | continuous | ||
/virus_a/key_follow |
46 | -64–63 | continuous | ||
/virus_a/filter_mode |
52 | 0–127 | continuous | ||
/virus_a/cutoff |
41 | 0–127 | continuous | ||
/virus_a/resonance |
43 | 0–127 | continuous | ||
/virus_a/env_amount |
45 | 0–127 | continuous | ||
/virus_a/key_follow |
47 | -64–63 | continuous | ||
/virus_a/series_4_pole |
53 | 0–127 | continuous | ||
/virus_a/curve |
49 | 0–127 | continuous | ||
/virus_a/filter_env |
54 | 0–127 | continuous | ||
/virus_a/filter_env |
55 | 0–127 | continuous | ||
/virus_a/filter_env |
56 | 0–127 | continuous | ||
/virus_a/filter_env |
58 | 0–127 | continuous | ||
/virus_a/sustain_time |
57 | -64–63 | continuous | ||
/virus_a/amp_env |
59 | 0–127 | continuous | ||
/virus_a/amp_env |
60 | 0–127 | continuous | ||
/virus_a/amp_env |
61 | 0–127 | continuous | ||
/virus_a/amp_env |
63 | 0–127 | continuous | ||
/virus_a/sustain_time |
62 | -64–63 | continuous | ||
/virus_a/1_bal_2 |
48 | -64–63 | continuous | ||
/virus_a/rate |
67 | 0–127 | continuous | ||
/virus_a/shape |
68 | 0–127 | continuous | ||
/virus_a/tri_symmetry |
71 | -64–63 | continuous | ||
/virus_a/envelope_mode |
69 | 0–127 | continuous | ||
/virus_a/osc_1 |
74 | -64–63 | continuous | ||
/virus_a/osc_2 |
75 | -64–63 | continuous | ||
/virus_a/key_follow |
72 | 0–127 | continuous | ||
/virus_a/key_trig_phase |
73 | 0–127 | continuous | ||
/virus_a/mono |
70 | 0–127 | continuous | ||
/virus_a/pw_1_2 |
76 | -64–63 | continuous | ||
/virus_a/resonance_1_2 |
77 | -64–63 | continuous | ||
/virus_a/filter_gain |
78 | -64–63 | continuous | ||
/virus_a/pan |
90 | -64–63 | continuous | ||
/virus_a/rate |
79 | 0–127 | continuous | ||
/virus_a/shape |
80 | 0–127 | continuous | ||
/virus_a/tri_symmetry |
83 | -64–63 | continuous | ||
/virus_a/envelope_mode |
81 | 0–127 | continuous | ||
/virus_a/shape_1_2 |
86 | -64–63 | continuous | ||
/virus_a/fm_amount |
87 | -64–63 | continuous | ||
/virus_a/key_follow |
84 | 0–127 | continuous | ||
/virus_a/key_trig_phase |
85 | 0–127 | continuous | ||
/virus_a/mono |
82 | 0–127 | continuous | ||
/virus_a/filter_1 |
88 | -64–63 | continuous | ||
/virus_a/filter_2 |
89 | -64–63 | continuous | ||
/virus_a/rate |
106 | 0–127 | continuous | ||
/virus_a/depth |
107 | 0–127 | continuous | ||
/virus_a/delay_time |
108 | 0–127 | continuous | ||
/virus_a/feedback |
109 | -64–63 | continuous | ||
/virus_a/lfo_shape |
110 | 0–127 | continuous | ||
/virus_a/chorus_mix |
105 | 0–127 | continuous | ||
/virus_a/vol |
38 | 0–127 | continuous | ||
/virus_a/delay_time_ms |
114 | 0–127 | continuous | ||
/virus_a/lfo_shape |
118 | 0–127 | continuous | ||
/virus_a/rate |
116 | 0–127 | continuous | ||
/virus_a/effect_send |
113 | 0–127 | continuous | ||
/virus_a/feedback |
115 | 0–127 | continuous | ||
/virus_a/depth |
117 | 0–127 | continuous | ||
/virus_a/color |
119 | -64–63 | continuous | ||
/virus_a/patch_vol |
91 | 0–127 | continuous | ||
/virus_a/pan |
10 | -64–63 | continuous | ||
/virus_a/transpose |
93 | -48–48 | continuous | ||
/virus_a/key_mode |
94 | 0–127 | continuous | ||
/virus_a/porta_time |
5 | 0–127 | continuous | ||
/virus_a/input_mode |
101 | 0–127 | continuous | ||
/virus_a/input_select |
102 | 0–127 | continuous |
SysEx commands (63)¶
| OSC address | Arguments |
|---|---|
/virus_a/osc1_shape |
val: u7 |
/virus_a/osc2_shape |
val: u7 |
/virus_a/oscs_phaseinit |
val: u7 |
/virus_a/osc_1_2_pw |
val: u7 |
/virus_a/fm_amount |
val: u7 |
/virus_a/env_polarity |
val: u7 |
/virus_a/keytrack_base |
val: u7 |
/virus_a/cutoff_link |
val: u7 |
/virus_a/intensity |
val: u7 |
/virus_a/env_amount |
val: u7 |
/virus_a/resonance |
val: u7 |
/virus_a/amp |
val: u7 |
/virus_a/pan |
val: u7 |
/virus_a/clock |
val: u7 |
/virus_a/rate |
val: u7 |
/virus_a/shape |
val: u7 |
/virus_a/fade_in_time |
val: u7 |
/virus_a/mono |
val: u7 |
/virus_a/destination |
val: u7 |
/virus_a/amount |
val: u7 |
/virus_a/key_follow |
val: u7 |
/virus_a/source |
val: u7 |
/virus_a/dest_1 |
val: u7 |
/virus_a/dest_2 |
val: u7 |
/virus_a/amount_1 |
val: u7 |
/virus_a/amount_2 |
val: u7 |
/virus_a/dest_3 |
val: u7 |
/virus_a/amount_3 |
val: u7 |
/virus_a/tune |
val: u7 |
/virus_a/mode |
val: u7 |
/virus_a/global_bpm |
val: u7 |
/virus_a/octave_range |
val: u7 |
/virus_a/pattern |
val: u7 |
/virus_a/note_length |
val: u7 |
/virus_a/hold |
val: u7 |
/virus_a/swing |
val: u7 |
/virus_a/midi_arp_send |
val: u7 |
/virus_a/smooth_mode |
val: u7 |
/virus_a/bend_up |
val: u7 |
/virus_a/bend_down |
val: u7 |
/virus_a/bend_scale |
val: u7 |
/virus_a/boost |
val: u7 |
/virus_a/direct_thru |
val: u7 |
/virus_a/definable_1 |
val: u7 |
/virus_a/definable_2 |
val: u7 |
/virus_a/category_1 |
val: u7 |
/virus_a/category_2 |
val: u7 |
/virus_a/panel_destinat |
val: u7 |
/virus_a/led_mode |
val: u7 |
/virus_a/lcd_contrast |
val: u7 |
/virus_a/knob_mode |
val: u7 |
/virus_a/master_tune |
val: u7 |
/virus_a/master_volume |
val: u7 |
/virus_a/note_steal |
val: u7 |
/virus_a/global_midi_ch |
val: u7 |
/virus_a/low_page |
val: u7 |
/virus_a/high_page |
val: u7 |
/virus_a/midi_dump_tx |
val: u7 |
/virus_a/midi_dump_rx |
val: u7 |
/virus_a/memory_protect |
val: u7 |
/virus_a/midi_clock_rx |
val: u7 |
/virus_a/program_change |
val: u7 |
/virus_a/soft_thru |
val: u7 |
Performance MIDI¶
Notes, pitch bend and any CC are also available: /virus_a/note/on <note> <velocity>, /virus_a/cc/<number> <value>, /virus_a/pitchbend <0-16383>, /virus_a/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.