You can access the Audio Preferences from the EditDesk (or by pressing Ctrl+Alt+F6 from anywhere in the application) as part of the overall Preferences menu. You can also access Audio Preferences from the clip library and from the Engineering menu in the Input and Output Clip menus.
To access audio preferences from the clip library:
(a) Import Audio button (b) Export Audio button
To access audio preferences from the Engineering menu:
(a) Input Clip button (b) Output Clip button