Compressor 4 - Converting Stereo Audio Files to Dolby Digital Professional Format

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Converting Stereo Audio Files to Dolby Digital Professional
Format

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

1

Add source audio files to the Batch window (see

Importing Source Media Files

for details).

2

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.

3

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.

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Chapter 12

Creating Dolby Digital Professional Output Files

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• 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.

4

If you want, make any adjustments to the setting in the Encoder pane of the Inspector
window (see

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.

5

Click Submit.

For information about encoding surround sound files, see

Assigning Files to Surround

Sound Channels (Manual Method)

and

Assigning Files to Surround Sound Channels

(Automatic Methods)

. Also see

About Previewing the Encoder Settings

for information

on playing your AC-3 audio files with Compressor.