Thanks for documenting this so well, will have a good read and think about building that. What DAC is this driving (apologies if you have mentioned this and I’ve missed it), and do you get similar results using different DACs?
The reason for my interest and question is that I have just purchased what I hope is my endgame DAC (yes really, stop laughing at the back…) a T+A DAC 200. This is supposed to have high precision clocks and buffer everything coming in and therefore be immune from upstream influences. It is currently fed from a RasPi3+ running RoPieee using USB out to the DAC 200. I know the Pi3+ has issues with regard to the shared USB/Ethernet interface so an upgrade has never been out of the question and it is getting on for 8 years old now.
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