Okay, one of the few problems that can happen is either the playback volume in your operator can be backwards. I think that lower case z is the loudest. And try to adjust the length of the sample being played.
Finally, norns has some issues with samples, usually demanding wav files and all. If these don’t fix it, maybe send an example of how you’re filling in that operator? It is built off of a much earlier version of Orca, and the Tiber operator is slightly different than OG ORCA.
Lastly, have you tried sending out MIDI signals to test that things are running properly?