I have an external instrument (D50 in this case) connected via a dedicated MIDI interface and the audio output of the D50 goes into a Scarlet 2i2. So I can setup an external track and an audio track to recored the analog output of the D50. I can hear the D50 sounds just fine if I play the instrument with the audio track selected. All of that works fine.
I can add an arpeggiator to the external track and it works fine except that I cannot hear the output of the D50. If I select the audio track I can hear it fine but then, obviously, I cannot interact with the D50 and the arpeggiator since they are not the selected track. What am I doing wrong here?
TIA!