Apple Motion 3 - Manual (Page 1135)

Chapter 13 Working with Audio 1135
3 Drag the keyframe up or down to set the level you want at a specific time. Drag down
to lower the level, or drag up to raise the level.
4 Add any other keyframes you need, and drag each one to set its value.
Note: You can also perform these operations in the Keyframe Editor.
To add keyframes to a pan curve:
1 Turn on the Pan checkbox.
You may want to turn off the Level checkbox, so that you can see the pan curve more
clearly, and see its numeric values on the left.
2 Option-click the blue pan curve to add a keyframe.
3 Drag the keyframe up or down to set the pan position you want at a specific time.
Drag down to pan to the left, or drag up to pan to the right.
4 Add any other keyframe you need, and drag each one to set its value.
Note: When modifying Pan values, you can Control-click a keyframe to display a
shortcut menu that lets you set different interpolation methods between points on
your curve. See “
Modifying Curves ” on page 545 for more information. Only the Linear
interpolation method is available for Level.
Crossfading Audio Tracks
In the Keyframe Editor, you can view the audio tracks in your project, along with the
level, pan, and speed curves for each track.
To create a crossfade, add keyframes to the level curve of each track at the same (or
nearly the same) points in time, where you want the crossfade to start and end. You
can use the frame numbers in the ruler of the Audio Editor for reference.
Be sure to listen to the crossfade as you work. You may find that the best-sounding
results are achieved by having the level curves for the two tracks be slightly
asymmetrical. This is because the perceived loudness of different sounds with the same
numerical value in the Audio Editor can be different.
You can use curves to create fade-ins, fade-outs, and other level changes in the Audio Editor.