using keyframes in iMovie?

[MacMan1216]

I am editing a movie, that is entirely music, and in 3 scenes, there will be spoken words, and I need the music to lower to about 25% of the volume that it is throughout the film.

The film is 4 minutes in length, and the spoken word parts are @ exactly 1:20, 1:50, and 3:50.

Please tell me how to do this mundane, and simple task!!!

P.S. - I have been a Windows user for life, and recently got into editing, and purchased my first brand new Macbook yesterday, and I am jumping right in. If there is somewhere to learn most of this relatively beyond the basics information, please point me in that direction, as Google has failed me today.

Thanks in advance.

 

[xstep]

You didn't specify which version of iMovie, but for the current version of iMovie 09 the following should be helpful.

What you are talking about is called ducking. Here is a YouTube video that explains it and how it works in iMovie 08 & 09.

If you are wanting to record you voice over the video, then you want to look at the "Adding a Voiceover to Your Movie" on Apples iMovie Tutorials page.