Because
higher audio quality results in a larger file size, experiment to
achieve the correct balance between quality and file size. (The
default setting is Medium.)
In PowerPoint, open a presentation (PPT file).
From the Adobe Presenter menu, select Preferences.
Select the Quality tab.
Under Audio quality, select one of the following options:
High
The largest file size and highest quality audio.
Medium
The best balance between file size and audio quality.
Low
The smallest file size and lowest audio quality.
Publish Without Audio
Removes audio files from the presentation before publishing.