I've connected a Cambridge Dacmagic to a Mac Mini via the optical
connection, and I'm not sure which settings to select in the Apple audio
setup, for stereo playback through iTunes. It offers a variety of 2ch
settings with a variety of formats (44.1 - 96) and bits (16 - 24). They
all work, but I'd like the theoretical best setting, if there is one.

Thanks, Rob