I just picked up a Macmini and am borrowing a friend's Audiophileo2 in hopes of seeing if I preferred a Mac based music server to Squeezserver which has been problematic for me for a while. A major motivator for this is that I understand my current DAC (Metrum Octave) should sound much better with 16/44 materials upsampled to 88.2khz due to its design.
I tried the Audiophileo2 briefly with an old Macbook pro running OSX 10.6 using a generic USB on Saturday and it sounded really good--nearly as good as my modified Squeezebox and that was with next to no optimizations, 2gbs of ram on a core duo machine running Pure Music... I expected the Macmini i5 w/ 4gbs of ram, Pure Music and my Wywires USB cable to be a big step forward, but things sounded weird and wrong--I'd even run Larry Moore's optimizations on the Macmini but I still didn't like what I heard.
I *know* a macmini can sound better then this, even with the stock PSU--so my question is: what do I need to do differently? Can someone point me in the right direction for optimizations for OSX 10.7?