What is Sync?

Sync refers to synchronization, or keeping two or more things working together. In video and audio editing, sync refers to making sure that the audio and video line up correctly in time. Examples of sync include:

Lip sync: A person's spoken words match their mouth movements on screen.
Camera/audio sync: Audio recorded on a separate recorder is aligned with video from the camera.
Music sync: Video cuts, transitions, or actions are timed to the beat or specific moments in a song.
Multi-camera sync: Footage from multiple cameras is aligned so they all show the same moment at the same time.

If audio is out of sync, speech appears before or after the mouth moves, sound effects don't match the action on screen, and music cues feel mistimed relative to the visuals.

Why Sync Matters

Sync directly affects how natural, professional, and believable a video feels. When dialogue is synchronized with a person's mouth movements, viewers can focus on what's being said. Even a small delay can be distracting and make the video feel unprofessional. Other benefits to syncing include:

Enhanced viewer experience
Supports storytelling
Reflects production quality
Increases realism

Syncing ensures all recordings represent the same moment in time.

Example Use Cases for Sync

  • Education: Educators use sync for recorded lectures, screen recordings, science demonstrations, and language learning videos. Example: A teacher's voice matches their mouth movements for on-screen explanations.

  • Businesses: Businesses use sync for training videos, corporate presentations, and marketing videos. Example: A manager uses voiceover to align with slides, charts, and animations.

  • Content Creation: Creators use sync to match dialogue with on-camera footage for podcasts, gaming videos, social media content, and vlogs. Example: An influencer makes a commentary video for gameplay events.

Frequently asked questions

Audio can go out of sync if there are export or encoding issues, different frame rates between recordings, or from incorrect project settings in the editing software.

Sync audio and video using a clapboard at the start of a recording, clapping hands to create a visible and audible marker, or matching timecodes when using professional equipment.

Timecode sync uses matching timestamps generated by cameras and audio recorders, letting editors align recordings accurately.