Apple Motion 2 - Manual (Page 888)

888 Chapter 13 Working With Audio
To turn an audio track on or off, do one of the following:
m In the Audio tab of the Project pane, click the activation checkbox on the left side of
the track. Click the checkbox again to return the track to its previous state (on or off ).
m In the Timeline, with the Show/Hide Audio button turned on, click the activation
checkbox (the left column). Click the checkbox again to return the track to its previous
state.
Turning an audio track off removes it from the overall audio mix. If your project
includes a lot of audio tracks, turning off unused tracks can free some of the
computer’s resources for other purposes.
Selecting Audio Tracks
To display an audio track in the mini-Timeline and in the Audio Editor, you first select it.
To select an audio track:
m Click anywhere in the row containing the track’s name and controls in the Audio tab.
Selected tracks are highlighted in blue.
You can select multiple tracks by Shift-clicking. However, the Audio Editor can display
only one track at a time. When multiple tracks are selected, the Audio Editor appears
empty.
Playing Audio Tracks
When you click the Play button in the transport controls, you hear the audio tracks in
your project play in time with your visuals. You can also play an individual audio track
separately from the project Timeline.
To play audio with your project:
m Click the Play button in the transport controls.
When you click the Play button, you hear all audio tracks in the project that are turned
on and are not muted.
To play an individual audio track:
1 In the Audio tab, select the audio track.
2 In the Audio Editor, click the Play button.
The audio track plays, and the playhead in the Audio Editor shows the region of the
track currently playing. Playback in the Audio Editor is independent of the project.
When you play audio tracks, the playback sample rate and bit depth are determined by
the playback device. Built-in audio plays back at CD quality (44.1 kHz sample rate, 16-bit
depth). If you are playing audio using an external device, Motion plays the audio using
the output settings for the device.
01112.book Page 888 Sunday, March 13, 2005 10:36 PM