The following options apply to all audio tracks (Audio 1, Audio 2, Audio 3, PIP Audio). To apply to a particular track only, lock the audio tracks that you do not want to edit.
Volume Up : Increases the volume of all audio on the Timeline by 25%.
Volume Down : Decrease the volume of all audio on the Timeline by 25%.
Replace with Silence : Mutes the audio selection on the Timeline. Unlike the delete or cut options, this option does not remove any of the existing waveform.
1. Lock the audio tracks (Audio 1, Audio 2, Audio 3, or PIP Audio) that you do not want to apply the option to.
2. Drag the seek bar across the Timeline to make a selection. You do not need to make a selection to apply the Volume Up or Volume Down options.