4.2

R: Right front channel
C: Center front channel
Ls: Left surround channel
Rs: Right surround channel
Cs: Center surround channel
LFE: Low-frequency effects channel (subwoofer, LFE)
Note: It’s important to understand that Compressor cannot
convert stereo audio files into 5.1 surround sound channels. If you
want to output a 5.1 surround sound audio file, you must first
create the six channels of audio required and then import those
surround sound files into Compressor. Then you can use
Compressor to output the surround sound source media file. For
more information, see .
After you import a surround sound source file, you can transcode
that file into any of the channel layouts above.
Compressor analyzes audio files during import to determine the
source file’s channels. When you apply a transcode setting to the
source file, Compressor automatically adjusts the channel layout
of the setting to provide logical results. For many settings, you can
choose Automatic from the “Channel layout” pop-up menu (in the
Audio inspector) to have Compressor determine the logical
channel layout based on the source file.
Compressor also maps channels intelligently during output. For
example:
If you assign a mono channel layout to a stereo source file: The
output file will be automatically downmixed.
Import and modify surround sound files