what settings in itunes to use a dac

i just set up my mac and forgot the settings in itunes so I can use my DAC into my amp.
talk about frustrating!!!!
The setting is not in iTunes. The steps are as follows.
System Preferences > Sounds > Output

Good Luck
You can use Benchmark's wiki to guide you. By the way,the VLC player from Benchmark's test is the only media player that is bit transparent for Mac.

Install Rogue Amoeba's SoundSource on your Mac. It gives you menu bar control over your inputs and outputs and a quick way to access the Sound Preference Pane.
thanks guys!!