I need your help: How does Ketron connect? I have its USB to my laptop, its RCA to my USB mixer, and my Roland controller USB to my laptop. Cakewalk is open and will record microphone from the mixer, but I get no instrument sounds. I don't grasp the MIDI path. My guess is: the controller sends (say) F# to Cakewalk, which enters F# on a MIDI track and sends F# to Ketron, which sends tone F# trumpet/whatever to the mixer, which lets me hear the result and which, when I'm ready to record the mix, will supply the audio for the audio tracks in Cakewalk. Please correct me or offer suggestions.

Jim