@hiend2 I would use AES with Jay’s and USB between BDP and BDA. Try a good USB cable before you switch streamers. Also a good power cord is essential with BDA-3.
FWIW I ran Lumin U1 Mini with BDA-3 via USB. Tried AES but still preferred USB. The sound was never harsh. Lumin app is pretty crappy but so is the Manic Moose. If you’re looking for a nice streamer look into Aurender.