@Progisus It is always interesting to read of your exploits and experiments.
I have recently been reading that several Extreme owners have been returning to Roon with comments that in their opinion the Roon player is much improved to the extent that they prefer it to HQP in pass through for their PGGB files.
I am still in Mscaler mode whilst I decide about PGGB but last night I fired up Roon on my K50 and indeed it does seem better than I remember. I think I will give it a longer trial.
After RW’s recent post defending the USB implementation on his DACs and the Mscaler I also went back to using USB direct as opposed to the SRC-Dx + BNC input to the Mscaler but I am afraid I still preferred the SRC-DX (plus of course a certain brand of BNC cables) because it all seemed rather less ‘in your face’ than USB direct from the K50 to the Mscaler.