Catalyst Manual - Cal Stage

Audio Output
Audio Playback
CHAPTER 13
Audio
In normal video only operation, Catalyst software will ignore audio tracks in a movie.
Catalyst software uses video acceleration algorithms to get the best possible performance
from the Macintosh computer. When using the audio playback feature, Catalyst software
prioritises the playback of the audio in a movie, over the playback of video. This means
that video performance may be affected by the playback of multiple audio and video
layers.
Catalyst uses Mac OS X's Core Audio API, which allows Catalyst to output through a wide
variety of PCI, USB or Firewire audio devices.
Each layer in Catalyst has it's own volume controland each volume control is a separately
patchable DMX channel. For more information on Playback features, see Video Playback
on page 43.
Audio Device Set up for Catalyst Audio Output
Setting up an audio
device for Catalyst to
output to is done within
Mac OS X System
Preferences.
1. Open System
Preferences from
under the Apple
Menu and click on
the Sound icon.
2. Click on the Output
tab to set up the
sound output device.
The number
of sound outputs
available depends
on which devices
you have installed.
A standard G5 Mac
has Internal Audio
and Digital Audio
available. If you
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