When you convert your material between different video standards, your audio falls out of sync due to the change in the video frame rate. To avoid this, use the Preset option to timestretch the audio based on the difference in frame rates of the source and destination video standards.

To convert audio between different video standards:

1. Open the Audio Tools menu and, from the Audio Tools box, select Timewarp.

   
   

2. From a reel, select a clip that requires audio timestretching.
3. Enable Preset.

   The Timewarp Preset options appear.

   
   

   (a) Preset button  (b) Source Frame Rate box  (c) Destination Frame Rate box  (d) Time Ratio field  

   The Source Frame Rate box shows the current frame rate of the selected clip.

4. From the Destination Frame Rate box, select the required value.

   The conversion value appears in the Time Ratio field.

5. Click in the upper-left corner of the clip to start conversion.