Hi - I am also having problems with DSD playback through dCS Vivaldi. I am running core on a MBP with output via USB to Vivaldi. All my DSD catalogue is in DoP format. I am using the dCS Upsampler Audio Device rather than the system output with the following settings:
Use Exclusive Mode - checked (although unchecking appears not to make any difference)
Use Integer Mode - not checked
Fixed volume - not checked
Max sample rate - disabled
Resync delay - 0ms
DSD Playback strategy; DSD over PCM (v1.0 DoP)
Max DSD sample rate (DoP) - disabled
I have been listened to “Roon Radio”, which keeps flipping between 16/44, 24/96, 24/192, DoP tracks etc. When it gets to a DoP track the dCS unit shows 24/176 (it usually shows "DSD for a DoP track) and the sound is a persistent click. The sound bar equalizer on Roon is flat, as if there is no output. The problem only exists on DoP tracks, which sound fine when streamed to the upsampler via the ethernet input (using Twonky). Any thoughts on what I am doing wrong?