I couldn't link to the article in 2-pop, since their server was down. The url is
www.2-pop.com/cgi/go.cgi?c-2001-05-21b though... (in case server is back when you read this.
Here's a synopsis:
Use your magnify tool to enlarge the clip so you can see what you're doing (on the timeline (hereby referred to as TL)).
First, turn on 'Overlays' by clicking the small graph-icon in the lower left of the TL. The overlay lines will be pink for audio and black for video. Sometime overlays are referred to as 'rubberbands'.
Next you need to turn on the waveforms for the audio. From the Menu > Sequence > Settings > Timeline-tab. Check the 'Show Audio Waveforms' box.
Use the pen-tool to add two points to the pink-audio band. One where you want it to start, and one where you want it to end. Drag the first point down to zero if you want it to fade in, or the second point if you want it to fade out. If you are in the middle of a clip, and want to raise or lower a section of the clip, use three points instead.
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That's no ordinary rabbit