For the record I stream with an Ethernet connection to a raspberry pie 3 with a digihat and a Toslink connection to my bifrost.
This HAT and toslink are a weak link. You’ll get much better quality output from Pi through RCA coax (or better with BNC if DAC has it) from a different HAT like this
https://allo.com/sparky/digione.html
Another option is HiFiBerry DIGI2 Pro