Hello there, own an iconnectmidi4+ for ages but never used it to send audio to my iPad. I can't get it to work. I can see iconnectmidi4+ in Ableton, sending on channel 1-2. I can see iconnectmidi4+ in Audiobus. I select 1-2 and there is no audio coming in. Not on the meters or anywhere else. What am I overlooking here?