I use Ableton Live to perform live shows with a Presonus Firebox. I use every analog output for different instrument sends and mixes. I use a return bus with the S/PDIF output for my monitor send. It's a different mix than any of the analog outputs. I rely on some return tracks for physical analog outputs. I need to be able to add them to my monitor return bus.
Is it possible to send one return track to another return track? The send knobs are grayed out on the return tracks.