PDF (adobe.com)

Insert silence

Insert silence to separate different types of program material, or to synchronize an audio file with live broadcasts or video.

  1. Do either of the following:

    • To silence existing audio, select it.

    • To add a specific duration of silence, position the current-time indicator  where you want silence to begin.

  2. Choose Edit > Insert > Silence. If you’re adding silence, specify a duration in seconds, and click OK.