Adobe Flash Professional CS6 Adobe Flash Professional CS6 Classroom In A Book | Page 311

4 Click on the top horizontal line of the top waveform above frame 20.
A box appears on the line, indicating a keyframe for the sound volume.
5 Click on the top horizontal line of the upper waveform above frame 45 and drag
it down to the bottom of the window.
The downward diagonal line indicates the drop in volume from 100% to 0%.
6 Click on the corresponding keyframe on the lower waveform and drag it down
to the bottom of the window.
The volume levels for both the left and right channels slowly decrease starting at
frame 20. By frame 45, the volume level is at 0%.
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Lesson 8
Working with sound and Video