# Voice or lip sync issues Shorten the spoken line first. Long or dense copy is harder to sync and less natural in UGC ads. One scene should usually contain one short line or one focused piece of narration. Use clean audio for lip sync. Background noise, music, or overlapping speakers can reduce quality. If using generated speech, choose a voice and pace that fit the actor and scene length. If sync is still poor, regenerate the audio, then regenerate the video or lip sync using the cleaned audio. Do not keep stacking fixes on a bad base clip. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.avastudio.com/troubleshooting/voice-or-lip-sync-issues.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.