Here are some config options for users with foobar.
For 24/192 playback via optical (tested with input 4 & 5), install the latest version of foobar and then install the ASIO v2.1.2 playback plug-in. Make sure you change your soundcard output to 192Khz in your cards control panel.
For 24/96 playback via optical (tested with input 4 & 5), install the latest foobar and then install WASAPI v2.1 plug-in. Make sure you change your soundcard's output to 96Khz in the cards control panel.
If you set the bit rate to something more than 96Khz, all you will get it static (and hurting ear drums) as this version of WASAPI seems to only support upto 96Khz playback. There is a beta version of this plugin in the works located here if you feel like experimenting.
If you decide to go with the 24/96 playback option, you will still be able to playback files above 96Khz, but they will be down-sampled to 96Khz.
On a side note, is it recommended to leave the DAC running 24/7 or is it best to shut it off when not in use?
edit: fixed links
Edited by rezolver - 7/6/12 at 8:20pm