Triggering a change in audio volume
I have an MP3 audio track over a screencast on one of my slides, and at a specific point a few seconds of video are shown in the screencast. I'd like to lower the MP3 audio track to a very low level so the audio of the video can be clearly heard, then raise it back to normal volume when the video element finishes.
I know I can pause and restart the audio track based on timeline/markers, but this is quite abrupt, and I think a reduction in volume would work much better.
Can anyone tell me if this is possible, and if so how?