I use mostly flac. files and on this unit they sound analog, the details are there but there is no digital harshness what so ever. This unit is a masterpiece on its own but when paired with the Aroma TB100 the sound is like what I remember from an Apex reel to reel being played through a Sansui ba200 to JBL L300's, Oh the childhood memories. Anyway I also pair it with the C9 which does enhance it's house sound but really unless you need the additional power it sounds great all by itself. I have finally found the solution to playing Flac. Files that where originally mastered for Vinyl and have them sound like I'm hearing them from Vinyl. Otherwise it was easy to set up, I just copied my files to an SD card inserted it and selected scan music and it did the rest. Setting up Tidal was easy as well and works perfectly.