I have recently traded in my Sonos equipment for Raspberry Pi 4’s. 2 with Allo Digione/Signature HAT’s (1 into Schiit Modius DAC, Vidar amp.), 2 with HiFiBerry Amp2 HAT’s; all running Ropieee XL.
I understand that the audio out of the USB of an RPi 3 was particularly poor due to the shared ethernet and USB bus and thus the Allo SPDIF HATs (and others) do a fantastic job of mitigating those problems.
With the Raspberry Pi 4, did the audio quality out of the USB improve to no longer necessitate a SPDIF HAT?
Could I run into my Modius (with Unison USB) or Modi or any other USB signal ‘cleaner’ and get the same or better audio quality?