Thanks for the explanation, Andrew!
I do upsample 16/44.1 and 16/48 in Roon in order for dual AES to work properly with these sample rates. I don’t upsample hi res content (24/88.2 and upwards to 24/384).
I mostly upsample 16/44.1 and 16/48 to DSD64, but good results can be obtained by upsampling to DXD too (24/352.8 and 24/384). The Paganini handles both very well.
Which combination of Roon upsampling settings do you find to work best? I tend to use the smooth/minimum phase filter and 5-CLANS upsampling settings. To be honest, I don’t even know what they do in technical terms.
Regarding the clock resyncing issue, it mostly happens when I skip tracks. Sometimes Room keeps an uninterrupted stream, sometimes it doesn’t. I haven’t managed to track down the cause of such behavior.
What bothers me the most is TIDAL. If I wish to skip a track, it breaks the stream every single time. For example, if I play a TIDAL album (through the “play all” button), the stream will not break. If I skip to the next song within the same TIDAL album, it breaks every time and the clock needs to be resynced. A workaround I found to work with TIDAL (instead of forced skipping to the next track) is pushing the time bar of the track to the very end, so that the next TIDAL track will start automatically. This is the only way to keep the clock in sync.
A few nights ago, for the first time in the past 6 months, I managed to skip from a library track to a TIDAL track without breaking the stream (without clock resyncing). That night was the first and only time that the NBR-Paganini combo displayed such behavior, and I failed to replicate it again.
So apart from MQA, the clock syncing issue is the most important thing to be sorted out with the NBR and older dCS DACs, if my opinion as a user matters. It would make our life so much easier!