Apple Final Cut Pro 7 - Manual (Page 857)

You can turn Downmix off at any time and your audio will be output to multiple channels
again. This is much more convenient than reassigning all of your tracks to a single stereo
channel and then reassigning your tracks to multiple outputs again.
All channels are output
independently.
Downmix button
deselected
Downmixing During Export
You can select the Downmix button to quickly export multiple audio outputs to a stereo
mix without changing your audio output presets. For more information, see
“Audio Output
Export Settings.”
Configuring External Audio Monitors
The following section describes how to connect external audio speakers to your editing
system and how to make audio level adjustments in Final Cut Pro and Mac OS X.
Connecting Speakers to Your Editing System
When you add audio speakers to your editing system, you need to make sure that the
speakers are properly connected to your audio interface or built-in computer audio output
and that the interface is properly configured in Final Cut Pro.
To connect self-powered speakers to your computer
µ
Connect the main left audio output of your audio interface to the left speaker, and connect
the main right audio output of your audio interface to the right speaker.
For more information about types of audio connectors and adapters, see “Connecting
Professional Video and Audio Equipment.”
857 Chapter 53 Assigning Output Channels and External Audio Monitors