In System Preferences under the Sound tab, make sure the output is set to Internal Speakers (or headphones if you have any plugged in) under the Output section.
In System Preferences under the Sound tab, make sure the output is set to Internal Speakers (or headphones if you have any plugged in) under the Output section.
Unplugging my audio interface and then later replugging it in has resulted in some funkiness in ML. Sometimes it'll revert to my Airport Express but then other times it will revert to my internal speakers as it should. I'll have to quit and relaunch iTunes as well or it won't even play anything.