If you proceed to edit without following the next steps, your audio may not work correctly!



Select all of your imported footage

From the clip menu choose "Modify > Audio Channels..."


Press Shift + G

Select "Mono" from the "Clip Channel Format" drop down
Set the "Number of Audio Clips:" to 2

Route your audio


Click OK

Drag you clips into the timeline 
If you get this warning, choose "Keep existing settings"