Yep, just ground one input through a cap. From the data sheet:

"To use the TPA2008D2 with a single-ended source, ac ground either input through a capacitor and apply the audio signal to the remaining input. In a
single-ended input application, the unused input should be ac-grounded at the audio source instead of at the device input for best noise performance."


 Imagine a single ended audio source, such as something from a MP3 player where you get reference,left and right.  I'm using a TPA2008D stereo amp, and the app notes show using a differential input.  Can i just tie the 'N' inputs to ground or do I need to convert from single to differential before driving into it?
       


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