If I understand you correctly, you're asserting that it's possible for transport-layer protocols to cause hiccups in the output because bits might get flipped.

If I understand you correctly, you're asserting that it's possible for transport-layer protocols to cause hiccups in the output because bits might get flipped. Except all of the transport-layer protocols before the DAC are working in digital logic and have checksums applied to them. A bit flip is going to be detected and corrected or the packet will be dropped and resent. So the transport isn't going to have any impact on the bits whatsoever (barring effects like a packet arriving too late to emit the sound on time).