Once an object has been added, select it and click on the "Custom Animation" button in the "Animation" group on the "Animations" tab.
Select an animation from the "Add Effect" button and make any settings needed for the specific animation.
Once added, simply double-click on the animation in the "Custom Animation" wizard on the right side of the screen.
This window allows users to add sound and set some other specific settings.
Click on the "Sounds" drop down to select a sound. Once the sound has been selected, simply click on the "speaker" icon to the right of the drop down. Edit the volume by clicking the slider up or down.
Once set, click on the "OK" button to save the changes and return to the PowerPoint presentation.
