I don't normally use Airplay but have been in my study room with the stereo set up. I'm not sure if this is an Apple bug or a Madsonic bug.
But when I try running Airplay from my Macbook Air it cuts back to the internal speakers after each song. It's strange. No fail cuts back after the end of each song. Reconnects just fine but will cut out at the end of that song.
MADSONIC REST API v2.5.0, SUBSONIC REST API v1.14.0