I just got a Griffin iMic for my mac mini. I hooked it up and went to system preferences > Sound > Output and changed the device to the iMic. I hooked my stereo up to the iMic, but only iTunes will play sound through the iMic to my stereo. Sound from websites, such as homestarrunner.com, and anything played on VLC all still play through the little built-in speaker. Is there any way to change this?