I'm using optical out from my mini to optical in on a Marantz pre/pro(no external DAC yet) The Marantz says it's receiving a PCM signal, but if I use HEOS which is built into the Marantz, it says it's receiving a FLAC file. I've enabled HD output on Amazon Music and and Tidal. I pay for premium subscriptions on both, and they're set to the highest streaming capabilities. Does anyone know why I'm not getting a FLAC signal from the Wiim? Do I have something set up wrong or is this normal? I'm using a brand new SKW optical cable. Any help is appreciated.