After you extract sound clips from any AML clips, you may then set their volume, fade in, and fade out values.
Select target object with motion clips (in the Command tracks) and perform Collect Motion.
The sound from the motion clips will be extracted to the Sound track of the selected object.
Click on the target sound clips you want to modify.
Go to the Modify Page/Sound Track section. Set the values of Volume, Fade In, and Fade Out.