You can add audio files to your scenes using the animation mixer. This allows you to adjust the timing of your animations by using the sound as a reference. For example, you can use an audio file as reference for lip syncing with a shape-animated face, or sync up some special effect noise with an animation. Or you could load an audio file to do some previsualization or storyboarding as you're experimenting with your animation project.
Sound files are added as audio clips on tracks in the animation mixer, the same way you can load action and shape sources as clips on tracks.
For more information about using clips in the animation mixer in general, see The Animation Mixer.
