It depends on dac and server or streamer
In general usb and ethernet are best sounding
Then aes ebu
Then coax
Worst is optical
Bnc is the same as rca coax with better jack
Usb when done correctly can sound amazing many dacs use asynchronous da t a transfer through usb whish syncs the data between the two devices
A dedicated server is way better then a pc
As the key to usb is data isolation which.is impossible in a regular pc
Our 442Evo servers feature a seperate cpu clock and usb sound card with two outboard power supplies we run dedicated usb out to the dac
And the sound is amazing like analog
DAVE AND troy
AUDIO INTELLECT NJ
us importer 432EVO music servers