- Add an instrument track and set up GA.
- Now make sure the pattern pads are showing, and click the midi port icon under pad 1 to switch on Use Pattern Midi Ports for Pattern Pads.
- Drag a pattern onto the GA track and start playback.
- This should play a cacophony of sound.
- In the track inspector, change the midi channel to 2 and start playback.
- You should now hear the pattern playing back correctly.
However, the manual says to do 1. and 2. above then create a midi track and set its output to Groove Agent - Main. If you do this, you’ll notice that the midi channel changes from 1 to 2.
You can add as many additional midi tracks as you need setting them to Groove Agent - Main for dragged patterns, and Groove Agent - Pattern for triggering patterns. Each time you add a track, the midi channel changes to the next available. Presumably this is being managed internally by Cubase.
I noticed, also, that if you go the additional midi track route, then unless you have selected the GA track (i.e. not the midi track target), then the drag/drop will not work.
Anyway, that might be way off for your problem/s, but hope it helps.