Cubasis doesn’t automatically forward a track’s MIDI input to MIDI output.
By default, MIDI input triggers the track, which is why you see the keys pressed on the internal keyboard, and MIDI output is only produced by playing the internal keyboard or via track playback.
Activating the MIDI Thru button will forward all MIDI input from the selected port to the selected MIDI output port. However, Cubasis has the known limitation that all MIDI data is forwarded 1:1 without re-routing. In other words, if MIDI Thru is enabled, the channel selection is ignored and everything is routed thru.
MIDI Thru re-channelizing is on our list of future updates. Until then, there are two workarounds:
- Enable the MIDI Thru button and configure your hardware keyboard to send on the desired MIDI channel.
- Use a MIDI routing app to route the MIDI signals and change their channels. MidiBridge was a good app for that, but the developer does not seem to have updated the app for iOS 11.
Best,
Lars