Originally Posted by kwkarth
Yes, and that is exactly what I expected to hear... Better sound from USB than from the famous crappy Apple Toslink, but much to my suprise and chagrin, the Toslink sounded better, which was not what I was expecting. The difference was not overt, but definite and repeatable. I did this test months ago and repeated it many times over the course of a few weeks because I knew it was contrary to what popular opinion was.
I would agree with you that on most DACs, toslink provides a cleaner and higher definition sound compared to USB audio output on a mac.
Nonetheless, with my previously acquired DI, I came with the conclusion that a good converter could make USB audio sounds better than the toslink output from a mac.
I have some confidence that the USB implementation on Bitfrost will be pretty decent so it will be interesting to see how does it fare between USB and optical input from a Mac =)