Support for Teenage Engineering OP-1

Using Zynthian
1

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 :sweat_smile: 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.

image
image1232×924 82.1 KB

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
    image
  • 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

1 Like
2

Yes. A ctrldev driver would allow this. Indeed it’s the right way to do it :wink:

The best,

2 Likes
3

Some starting points:

When the wiki refers to “the process that’s described here“ it means:

and for examples of Ctrldev Drivers:

and in this forum:

3 Likes
AKAI MPK249 Support
4

Thanks @jofemodo and @tunagenes for the confirmation and info, I’ll try it out.

5

Regarding Ctrldev - ZynthianWiki, is it correct that I can remove the indicated part from the Wiki, as it is obsolete now?

image
image660×780 60 KB

1 Like
6

yes, please, remove it

1 Like
7

Done

8

zynthian_ctrldev_teenageengineering_op1.py (6.1 KB)

Thanks for the all the tips!

Here’s is a first version of a ctrldev driver for the Teenage Engineering OP-1 Original. Feedback is welcome before I submit a PR for it. For now, only the basics are mapped:

  • encoder rotation
  • encoder button push (and release, so short/bold/long works as expected)
  • tempo
  • play/record toggle
  • arrows up-down, left-right

Notes:

  • Tested on latest vangelis.
  • Tested with latest firmware version 246.
  • Designed to work with OP-1 in MIDI Mode:
    • On OP-1, press Shift+COM
    • Choose CTRL (Button T2)
    • Press Shift button to verify knobs are sending relative CC, change with blue encoder if needed.
    • Press Shift button to verify <> buttons are sending MIDI CC, change with white encoder if desired. Set to Octave ± if this behavior is preferred.
4 Likes
9

Super cool, @jawn!
Please, could you send a PR to Vangelis?

Thanks!

10

Done

Add driver for Teenage Engineering OP-1 Original by jawn · Pull Request #552 · zynthian/zynthian-ui

1 Like
11

Merged!

Thanks

12

BTW, could you add an entry into the wiki section for ctrldev drivers?

(please, specify it’s for Vangelis)

Thanks!

13

Done

Supported plug & play MIDI controllers - ZynthianWiki

1 Like
14

Wonderful!

Thanks!

1 Like