Audio Bounce Extensions preferences let you set the bounce extension and the surround format. The Bounce Extensions pane consists of the following preferences:
When Show Advanced Tools is selected in Advanced preferences, the following are available:
Stereo Left and Right fields: Sets the bounce extension.
When Additional Surround Options is selected in Advanced preferences, the following are available:
Surround Show As pop-up menu: Sets the surround format. The choice you make automatically updates the remaining pop-up menus in the Bounce Extensions pane.
Surround Initialize button: Resets the bounce extension to its default value.