Sorry to be the bearer of bad news, but the Digitakt won’t record or pass through PB or Mod wheel data. It’s been a feature request for ages, so I can’t see it getting fixed any time soon. You could potentially use a MIDI merger or a box like the Blokas MIDI hub to get around it if you just want to pass it through, but it’s no help if you want to record mod wheel etc in the sequencer . See this old thread: Live record mod wheel PB data from external keyboard?