Electrical 2014 stereo/usb

Looking for audio help- 2014 GT/CS with factory shaker/nav. When I plug in an mp3 player or usb thumb drive into the port in the center console, it registers on the headunit and even shows as playing tracks, however I'm getting no audio. Ive also tried using the aux jack with my mp3 player and an ipod with no audio output from the speakers. I pulled the rear of the console and the jacks appear to be connected. Any ideas?
 
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