Apple Final Cut Pro 7 - Manual (Page 855)

• Exporting to multiple audio channels. For more information, see “Exporting Audio
Output Groups to AIFF Files” and “Exporting Multichannel QuickTime Files.”
How Downmixing to Stereo Works
When a sequence is downmixed, all output busses are mixed together in a downmix
stereo bus and then sent to outputs 1 and 2 on your audio interface. Stereo output busses
are sent to the downmix bus in stereo; mono output busses are centered in the downmix
bus.
2 1
Busses
Hardware
outputs
Timeline tracks
Audio clip
Audio clip
Audio clip
Audio clip
Audio clip
Audio clip
1
2
3
4
5
6
Tracks 1 and 2
(stereo)
Tracks 3 and 4
(centered)
Tracks 5 and 6
(stereo)
Three bus groups
downmixed to
two channels
Adjusting a Channel’s Downmix Volume
Each audio output bus has an adjustable downmix level that is applied only when you
downmix your audio. Each audio output bus’s level is attenuated (or increased) by the
number of decibels specified in the Downmix pop-up menu for the bus, in the Audio
Outputs tab of the Sequence Settings window for the current sequence.
You should use the default settings unless your stereo downmix has distortion or is too
quiet. If your downmix level exceeds 0 dBFS, you may need to attenuate the downmix
level of some of your output busses. If your downmix is too low, you can boost downmix
levels to increase output level. Typically, the more channels you are downmixing, the
more reduction is necessary for each channel to make sure the downmixed stereo signal
doesn’t exceed 0 dBFS, which would cause distortion.
855 Chapter 53 Assigning Output Channels and External Audio Monitors