I can confirm that Airfoil for Mac by Rogue Amoeba Software will work. I have an audio cable running from my Airport Express out to my home stereo system and after launching Airfoil and BIAB I simply select BIAB as the sound source. Works like a charm.


UltraPAK 2021, 27" late 2012 iMac, 16 GB RAM, OSX 10.15.7
Logic Pro X 10.6.3