Apple Final Cut Express 4 - Manual (Page 670)

670 Part VIII Audio Mixing
Adjusting Audio Filter Parameter Keyframes
You can add keyframes to audio filter parameters using the Selection and Pen tools,
just as you would for video filters.
To set a keyframe while playback is paused, do one of the following:
m Move the playhead in the keyframe graph area of the Viewer Filters tab to the time
where you want to put a keyframe, then click the keyframe button for the parameter
you want to set.
m With the Option key held down, position the pointer over the keyframe graph line for a
parameter. When the pointer turns into a Pen tool, click to add a keyframe to the
keyframe graph line at that point.
The keyframe appears as a small diamond on top of the keyframe graph line.
To set additional keyframes for a parameter while playback is paused:
1 Move the playhead to another point in the Filters tab’s keyframe graph area where you
want to set a keyframe.
2 Do one of the following:
 Drag the parameter slider to set a new keyframe with that value.
 Type a number into the appropriate field to set a new keyframe at that value.
 Click the appropriate keyframe button to add a keyframe to the keyframe graph line
of that parameter at the keyframe graph line’s current value.
 With the Option key held down, click anywhere on a parameter’s keyframe graph line
with the Pen tool to add a keyframe at that point without changing the value of the
keyframe graph line at that point. You can add as many keyframes as you want by
clicking repeatedly with the Option key held down.
The new keyframe appears as a small diamond on top of the keyframe graph line.
Click here to create a
keyframe for that
parameter.
The Pen tool lets you
add a keyframe.