Seems to me the bug lies in the effect, or at least the setting of the effect, which auto ducking applies to the clip. In the case of your screen shot, the give away is the top right corner of your Music Bed clip which says "Amplify: Left". I too have that appear when I attempt this, though sometimes it applies "Amplify: Right". When you examine the settings of Amplify in the Clip Effect rack I am seeing the following... So I try altering the Gain sliders... Suddenly they snap to! I close the window and play the track. Still not working. I open the Amplify setting again and see this now... I know I'm not crazy. I called Adobe Tech Support and they indicated that Ducking only works properly when you're editing either all Mono or all Stereo which makes no sense. I've done this with both Mono and Stereo voice tracks and it is still malfunctioning. This has to be a bug. I've seen so many YouTube videos that demonstrate this feature and it works perfectly. I anxiously await the next patch.
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