229 Adjusting audio in the Effect Controls panel The Audio fixed effect works like any other effect in that you can use keyframes
to change audio over time. You can also apply an audio transition (which changes
audio volume levels over time) and adjust its settings in the Effect Controls panel.
1 Make sure the Medieval_JBO2.aif clip is selected on the Audio 5 track, and
open the Effect Controls panel. Click the Volume disclosure triangles to display
the parameters and widen the Effect Controls panel so you can see its Timeline.
If the Timeline is not open, click the Show/Hide Timeline View button. Make
note of a few things:
t Bypass : Bypass is something you haven’t seen up to this point because only
audio effects have this option. For the Volume effect, turning on Bypass
at any point in the clip (via keyframes) switches back to the clip’s original
volume level. You can use Bypass to switch any audio effect off and on any
number of times within a clip.
t Level : This is the only adjustable parameter.
t Keyframes : All the keyframes and keyframe interpolation methods (the
hourglass icons) you applied to the clip in the Timeline show up in the
Effect Controls panel’s Timeline.
2 Add several keyframes to the first four seconds of the project, and change the
volume level on each one. Play the clip to hear the level adjustments. Click the
box next to Bypass, play the clip again, and notice the level adjustments you
made are not used.
3 Marquee-select all the keyframes in the Effect Controls panel’s Timeline, and
press Delete.
4 Now you’ll apply a transition to the
same clip on the Audio 5 track. Drag
the Constant Power audio transition
(Audio Transitions > Crossfade) to the
beginning of the clip on the Timeline.
Release it when you see the start of the
clip turn purple.
