Audio Sync.

Audio synchronization preserves the intended time relationship between sound and picture. Audio is organized around samples and channel information, while video uses displayed frames and their timing. An audio frame can have a format-specific meaning that differs from a video image. These distinctions matter when clips are trimmed, retimed, resampled, or placed on a new timeline. A correct-looking still cannot demonstrate synchronization, and a matching total duration does not prove that events remain aligned throughout the sequence.

The guide in this archive connects frame-based editing with the sound track that accompanies it. Pay attention to source and timeline time, conversion assumptions, and the handling of gaps or speed changes. The audio and video editing guide offers the complete context. Use recognizable reference events, such as a visible clap or spoken syllable, when inspecting an export. Check both early and late points so a fixed offset can be distinguished from timing that gradually drifts.