WHY? Wav playback is way better than Flac or Internet Radio

[Devgcl]

Hardware is Synology 412+. Renderer is Oppo 103d controlled from Android or Ipad Oppo Media Player.
BTW, today i tried running the same Internet Radio channel directly from my NUC via USB to my DAC as comparison to running from Minimserver/minimstreamer. Sound is near similar or Minimserver source maybe a touch blacker/clearer.

I am inclining to think Minimserver is showing clear differences between WAV, FLAC and internet radio 128kpbs stream differences. WAV sounds glorious in all respect.