My pi based streamer uses the 502dac hat to output coax spdif to my dac. picoreplayer is the software and it runs squeezelite to go with Logitech Media Streamer on my pc.
There is no usb in use, no wifi. I can operate with my phone or tablet. I’ve set it to downsample my few dsd files and it feeds the song thru ethernet to the pi’s memory and plays the music from there… The software also runs in memory so no writes to the sd card.
I run an lps to the 502dac board which supplies power to the pi. It’s a very clean solution for power and noise and it shows this during playback.
There are tons of hats out there but I can’t imagine them getting much better than this, but
I didn’t imagine the Gungnir MB A2 would sound so much better than the Mimby or soekris 1321 either, so who knows?