This Tutorial is about how to add a Voiceover in iMovie 11

See How To Do a Voiceover in iMovie For iOS: http://youtu.be/RDis3vr8zQY

See How To Do a Voiceover in iMovie 06: http://youtu.be/514sv4XJSxs

Explanation: To adjust the volume of your voice double click on the clip or click on the i, Then go to audio, and drag this volume slider up and down. For Voiceovers you can use ducking, meaning that you can make the voice recording louder and everything else softer. So, here is what it sounds like.