Converting Audio Files to Dolby Digital Professional Format
Follow these steps to encode a Dolby Digital Professional (AC-3) stream.

To encode an AC-3 stream:
STEP 1. Add source audio files to the Batch window.

STEP 2. Enter a name for the batch you are submitting in the Name field.

STEP 3. Do one of the following to apply the appropriate Apple setting from the Dolby Digital
Professional category to the source audio file:

• Choose a setting from the pop-up menu in the Settings column of the Batch table.
• Drag a setting from the Settings tab of the Presets window to the source audio file in
the Batch window.

STEP 4: Optionally, make any adjustments to the setting in the Encoding pane of the Inspector
window.

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 down-mixed.
• 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.

STEP 5. Click Submit.

Source: Apple's Compressor 2 User Manual

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