Converting Stereo Audio Files to Dolby Digital Professional
Follow these steps to encode a stereo (2/0 L,R) Dolby Digital Professional (AC-3) stream
from a stereo source media file.
To encode an AC-3 stream
Add source audio files to the Batch window (see
Importing Source Media Files
Save the batch by choosing File > Save As (or pressing Command-Shift-S), then entering
a name for the batch, selecting a location, and clicking Save.
Do one of the following to apply the appropriate Apple setting from the Dolby Digital
Professional category to the source audio file:
• Choose Target > New Target With Setting, choose a setting, and click Add.
Creating Dolby Digital Professional Output Files
• In the Batch window, Control-click in an empty part of the job, choose New Target With
Setting from the shortcut menu, choose a setting, and click Add.
• Drag a setting from the Settings tab to the source audio file’s job in the Batch window.
If you want, make any adjustments to the setting in the Encoder pane of the Inspector
About the Dolby Digital Professional Encoder Pane
for more information).
Note: Compressor will map channels intelligently. Here are some examples:
• If you import a stereo source file and apply a mono 1/0 (C) audio coding mode to it: The
file will be downmixed.
• If you apply a surround audio coding mode to the stereo file: The left and right channels
will be mapped to the left front (L) and right front (R) channels, leaving the other
channels of the coding mode silent.
• If you assign a stereo file to the left front or left (rear) surround channel: Compressor will
pick the left channel and ignore the right channel.
For information about encoding surround sound files, see
Assigning Files to Surround
Sound Channels (Manual Method)
Assigning Files to Surround Sound Channels
. Also see
About Previewing the Encoder Settings
on playing your AC-3 audio files with Compressor.