Assigning Files to Surround Sound Channels (Automatic Methods)

Compressor offers some streamlined channel assignment techniques that can save you time.

To assign files to surround channels with channel identifier codes
  1. Append the channel identifier code of the target surround channel to the filename of each source audio file. (See the list below for a list of the appropriate channel identifier codes.)

    • -L: Left front channel
    • -R: Right front channel
    • -C: Center front channel
    • -Ls: Left surround channel
    • -Rs: Right surround channel
    • -S: Center surround channel
    • -LFE: Low frequency channel (Subwoofer, LFE)

    For example, to assign an AIFF file to the left surround channel, rename the file as filename-Ls.aiff (where filename is the name of your file).

    Note: Mac OS X may add a file extension like .aiff. This will not interfere with this channel assignment method.

    This procedure only works when you drag and drop files into the Batch window. If you drag the files onto the Compressor application icon, they will appear as separate source files, each in its own job.

    Note: If you are creating Dolby Digital Professional (AC-3) surround sound streams, you will not use all the channels listed in the table at once. See Audio Tab Settings for a diagram of the Dolby audio coding modes.

  2. Drag the renamed source audio files to the Batch window.

    If the following conditions are met, Compressor automatically collapses the entire group of files into what appears as a single surround source media file in the Batch window:

    • The files in the group must be named correctly. (See the channel identifier codes listed above.)

    • The total number of files in the group must be fewer than seven.

    The Inspector window shows the audio files assigned to each channel.

    Figure. A surround source media file job in the Batch window and the corresponding icons in the Inspector window.

    Note: You can click a channel icon in the Inspector window to change the file assigned to it.

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

    • Choose Target > New Target With Setting, choose a setting, and click Add.

    • In the Batch window, Control-click in an empty part of the job, choose New Target With Setting from the pop-up 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. Make any necessary adjustments in the Inspector window and click Submit.

Compressor creates an AC-3 surround audio stream. See About Previewing the Encoder Settings for information on playing your AC-3 audio files with Compressor.