What is the main function of the "Sync" tool in Avid Media Composer?

The main function of the "Sync" tool in Avid Media Composer is to synchronize audio and video clips that have been recorded separately. This is particularly important in filmmaking and video production, where audio and video often are captured on different devices, leading to potential issues with timing. The "Sync" tool allows editors to align these tracks accurately so that the audio matches the visuals perfectly, ensuring a cohesive and professional final product.

Using this tool, an editor can match the waveforms of the audio with the movement in video or use timecode information to align clips accurately. This synchronization is critical for ensuring that dialogue, sound effects, and other audio components correspond with the visual elements of the project. The ability to effectively sync audio and video helps maintain the flow of the narrative and enhances the viewer's experience.

The other choices focus on different functionalities, such as color matching, audio level adjustments, and transitions, which do not pertain directly to the core purpose of the "Sync" tool.