Hi Zynthians,
What doesn’t work yet
I would like to map the rotating encoders of an OP-1 to simulate those in the V4 or V5 style kit. I see here that this was not supported yet - is this still true? If not mappable, would I be able to solve this with a driver?
Long version, what works
To fake an official zynthian kit while reusing gear I already have as part of my GAS 
project, I looked for something that had at least 4 rotary encoders with switches.
I almost gave up until I remembered this gadget lurking in a corner: an original OP-1 (so not the updated Field version). And yes, it has 4 colorful rotary encoders with switches.
Is this overkill to use as a controller for a zynthian? Probably. Does it matter? Not to me, as I can still use it for other purposes and I already have it.
Recipe I have so far:
- Connect OP-1 to Raspberry Pi (zynthian) via USB
- Power on both OP-1 and Pi
- Set OP-1 to COM mode: press Shift + COM
- then Choose the T2 button (the large 2 below the text CTRL) to enable MIDI controller mode.
- Optionally configure MIDI channel as described here.
Version used:
- Testing (vangelis) with latest updates.
What works:
- The keyboard works for playing notes, as you’ld expect.
- I can map the encoders to specific instrument level controls with MIDI learn.
Best regards,
Bernard
And the MIDI log below:
| A | Rotating encoder | Column 2 | Column 3 | Column 4 |
|---|---|---|---|---|
| Encoder/Switch | Blue | Green | White | Orange |
| Press and release MIDI CC | CH#01 CONTROL_CHANGE 64 => 127 CH#01 CONTROL_CHANGE 64 => 0 | CH#01 CONTROL_CHANGE 65 => 127 CH#01 CONTROL_CHANGE 65 => 0 | CH#01 CONTROL_CHANGE 66 => 127 CH#01 CONTROL_CHANGE 66 => 0 | CH#01 CONTROL_CHANGE 67 => 127 CH#01 CONTROL_CHANGE 67 => 0 |
| Rotate encoder | See *** below | Same but CC2 | Same but CC3 | Same but CC4 |
***:
Absolute mode: CH#01 CONTROL_CHANGE 1 => (value between 0 and 127)
Relative mode, rotate left: CH#01 CONTROL_CHANGE 1 => 127
Relative mode, rotate right:CH#01 CONTROL_CHANGE 1 => 1
