8.3.1 midi cc introduction
type: control the op-1 over usb midi · by pcppcp / op1r ↗
Every key, knob and mixer level can be controlled with MIDI CC over USB, on the OP-1's MIDI channel. Map a hardware controller or your DAW to it.
Keys use the same numbers as the OP-1's own CTRL mode. A value of 64 or more presses the key, under 64 releases it, so combinations like REC + PLAY or SHIFT + a key work.
8.3.2 opening midi cc
Connect over USB and send CCs on the OP-1's MIDI channel.
8.3.3 cc numbers
CC 5 … 17
help, metronome, synth, drum, tape, mixer, T1 … T4, lift, drop, scissors
CC 21 … 25, 50 … 52
keys 1 … 8
CC 26
sequencer
CC 38 / 39 / 40
REC / PLAY / STOP
CC 41 / 42 / 43
← / → / SHIFT
CC 48 / 49
mic / input, COM
CC 102 … 105
blue, green, white, orange knob, relative: 1 … 63 up, 65 … 127 down
CC 106 … 109
mixer: track 1 … 4 volume
CC 110 … 113
mixer: track 1 … 4 pan (64 = centre)
CC 114 … 117
mixer: track 1 … 4 mute (64 or more = muted)
CC 118
tape input level
8.3.4 tips
- CC 1 … 4 still go to the MIDI LFO, and CC 64 is still the sustain pedal.
- Hidden extra: an OP-Z controller mode in COM, CTRL. Send the SysEx F0 00 20 76 00 01 03 F7 to switch it on, F0 00 20 76 00 01 00 F7 to switch it off.