It would be great to select a group or aux bus as a source to feed into the Listen bus at all times. In my use case, I set up an aux with all talkback mics (FOH, mine at MONS, Several from the band) so that I can always hear someone addressing me through a talkback mic no matter what other input or monitor bus I am PAFLing.
Currently, I route this bus out of 1/4” output B and back into a local input socket with a short TRS to XLR patch cable. I then select that local input as the Ext in to PAFL source. It would be much more convenient to do this routing internally and save the physical i/o for other uses.
Thanks!