Separate/Extract Audio From Video

Right click on Video in the Timeline

Choose Separate Audio from Video in the pop-up menu

The Audio of the Video is added to the first available Audio Track and the Audio contained within the Video is Muted in O&A Properties

The Audio of the Video in its own track is linked to the Slide containing the Video

The Mute Audio Button is ticked automatically

It only mutes the Audio Contained within the Video and has no effect on the Separated/Extracted AUDIO IN ITS OWN TRACK

The Separated/Extracted Audio can be edited via the Envelope Properties.