Apple Final Cut Pro 5 - Manual (Page 1604)

Chapter 19 Exporting QuickTime-Compatible Files 253
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QuickTime Movie Sound Settings
Click Settings to choose an audio format, number of channels, sample rate, and
additional settings. Depending on the format you choose from the Format pop-up
menu, additional settings may be available.
Important: If there is no audio in your clip or sequence, deselect the Sound Settings
checkbox. Otherwise, blank audio tracks are created in your QuickTime movie file,
which require additional space.
 Format: To reduce file size and download bandwidth, select a codec to compress
the audio tracks. If you’re outputting full-resolution audio, choose Linear PCM.
 Channels: Select Mono, Stereo (L R), or 2 Discrete Channels. If you’re delivering
material for the Internet, you may want to choose Mono because it cuts your audio
file size in half.