automatic audio sync
The “Use audio for synchronization” option makes precision sync adjustments using audio waveforms. You can use this option to sync angles in a multicam clip and to sync video and audio clips together into a compound clip.
![An illustration showing waveforms in the audio portion of multicam clips synced by a common sync point](https://help.apple.com/assets/5F0F9167680CE2A228C9294A/5F0F916A680CE2A228C92958/en_US/947f6190da21833c91d7254a280ecc1d.png)
Note: Some audio recordings are not suited for use with this feature. Selecting this option may result in long processing times during which Final Cut Pro is not available for editing.