simplest way to push iTunes through an external DAC

Simple menubar app works well with my DacMagic Plus over USB. I wouldnt mind an option to disable upsampling to compare against my DACs native upsampling. Nice way to funnel iTunes to my Rotel amplifier while leaving other mac audio and sound effects to my desktop speakers. On an unrelated note, Apple why did you remove integer mode in 10.7 - bring it back!

Update for 10.9 - Bitperfect working fine, and Integer mode is back in the OS. I found the Do Not Upsample setting too, which is nice. I am leaning towards Audirvana+ now as my FLAC collection grows and its integration with iTunes using proxy files, but the Bitperfect price and simplicity really is the best overally value out there for people with a DAC and who just want basic/obvious functionality without the hassle of using Audio Midi Setup (which cannot send ONLY iTunes output to the DAC!)

soundbored about BitPerfect, v1.0.8