I used to use raspberry pi + digi+ coax out connect into DAC using Volumio… and i am quite happy with the setup… my music server got lots of FLAC at up to 24/48.kHZ and can play HDCD out of my FLAC.. how do i know because i am using Parasound D/AC-2000 and it show the output at 44/48 and HDCD…

recently i got a Sonos Connect Gen 2… perfect for Sonos Apps S2…. and i found out in Line Out Level for Sonos Connect got 3 options, Variable, Fixed and Pass-Through… what is the best setting ? and can i stream my FLAC at 24/48kHZ or even got HDCD decoding on it ?