Input preferences are only available when Additional Surround Options is selected in Advanced preferences.
Input preferences are only available when Additional Surround Options is selected in Advanced preferences.
These preferences let you set the surround format.
Surround Show As pop-up menu: Sets the surround format. The choice you make automatically updates the remaining pop-up menus in the Input pane.
Surround Initialize buttons: Choose between the default setup of Logic Pro, the ITU (International Telecommunications Union) standard, and the WG-4 standard.