iMovie- detaching audio in Picture-in-Picture clips

[Swampdonkey]

Hi, I am using pic-in-pic full screen dissolves in an iMovie project. The problem is that when I attempt to detach and scrap audio in the 'superimposed' clip (ie. the 'top' one), it appears to do so, but then the audio comes through when I play the project back. There must be a very simple reason for this. Surely...

 

[linuxcooldude]

Maybe you can adjust the audio volume level to zero instead of trying to remove it?