Apple Compressor 3 - Manual (Page 139)

Audio Tab Settings
All the most important Dolby Digital Professional settings are accessible in the Audio Tab.
• Target System: Compressor limits available settings to those appropriate for the target
system. If you’re encoding for use with DVD Studio Pro, choose DVD Video. Choose
DVD Audio only if you are encoding for use in a DVD Audio authoring application.
Choose Generic AC-3 to remove the setting limits.
• Audio Coding Mode: Specifies the audio channels of the encoded stream. This setting
also has an Automatic button.
The Audio Coding Mode
Automatic button
139 Chapter 10 Creating Dolby Digital Professional Output Files