Logic Pro 9 User Manual: Adding and Removing Audio Files. You can add audio directly to the Arrange area, or to the Audio Bin, using any of the methods covered in this section.
The Audio Bin acts as a central repository for all audio files added to the project, whether or not they are used in the Arrange area. This is useful for keeping all takes associated with the project in one location, even if not all are actually used in the final production. Final Cut X Overview Tutorial. Leopard Guided Tour (part 3 of 4) Mac OS X : raccourcis clavier