Method 1: Step 1: Click on the |settings| menu. Then Choose |Preferences| Step 2: From the new |Preferences| window: On the left hand side menu, click on |Audio| Step 3: Check the |Advanced options| on Step 4: Change the setting: Audio desynchronization compensation. Adjust it so that it matches the video. You may have to play around this a bit The values are in the unit of ms(milliseconds). So 1000ms = 1 sec Note: Positive numbers move the audio forward Negative numbers move the audio back Step 5: Click on Save. -Be sure to go back in the options again and change it to zero after you are done watching the video that was initially out of sync. -Or you can click on |Reset All| once you are in the Preferences window. Method 2: Use the keyboard shortcut keys J(decrease) and K(increase) for temporary sync while watching.