I am using Creative Cloud Express in the classroom for a class project. A student of mine would like to include music in parts of his video, but have it fade out or turn off in other portions because he's incorporating a clip of an interview. It seems that while we can adjust the sound level of the music and toggle it on/off, it applies to the video as a whole, not individual parts. Is it possible to remove music for the video portion of his interview, but not all of it?