Tuesday, March 31, 2009

Adjusting volume dynamically

Believe it or not, I very seldom adjust the overall volume of an entire clip or track. Usually I prefer to adjust volume dynamically throughout the clip. Adjusting volume dynamically allows me to fine-tune audio to better match other things that are going on in the project. I adjust volume dynamically at times like these:
  • Narration is about to begin: I may reduce the volume of background music a bit so that the spoken words are more easily heard.
  • The sound changes between video clips: Such a change often sounds abrupt or harsh. I can reduce that by fading audio in at the beginning of the clip, and fading it out at the end. Studio has handy Fade In and Fade Out buttons, which automatically make fade adjustments to the audio rubberbands for a clip.
  • I can eliminate unwanted sounds from a clip: For example, the Scene 1 sample clip from the companion CD-ROM shows a motorcycle passing by the camera on a racetrack. But the beginning of the clip has the sound of another motorcycle that is actually behind the camera. I can eliminate the sound of that other off-camera motorcycle by dynamically adjusting volume as I’ve done in Figure.
Dynamic volume adjustment is where audio rubberbands really come in handy. Click once on a rubberband for one of your audio clips. When you click the rubberband, you’ll notice that a little dot appears. You can click-anddrag that dot up or down to adjust the volume of the clip. Not only can you place as many dots as you can squeeze onto a rubberband, you can also move those dots around on the rubberband to make constant adjustments throughout the clip. Like real rubberbands, audio rubberbands are stretchy and can be moved quite a bit, but unlike real rubberbands, they don’t snap back when you stop moving them. Play around a bit with the rubberbands to see just how fun volume adjustments can be!
Those little dots on audio rubberbands act like pins to hold the bands in place. If you want to get rid of a dot, click-and-drag it off the top or bottom of the clip. Twang! The dot will disappear and the rubberband will snap back into place.

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