CHAPTER 3: EDITING 65Changing the volume of clipsAudio clips and the soundtracks of video clips have a volume rubber band in themiddle that is used for adjusting sound volume. Simply drag the rubber band up ordown to change the volume.To change the sound volume of a clip from the Timeline:1. Select the clip whose sound volume you want to change.2. Click on the rubber band (baseline) that appears in the middle of the clip. Acontrol point is placed at the position of your pointer.Changing the sound volume from the Timeline3. Drag the control point up to increase volume at this point, down to decrease.(All the way to the top doubles the volume; all the way down means no sound).To add additional control points, repeat steps 2 and 3.Changing the speed of clipsRetiming clips is a very powerful feature that allows you into the “time domain” ofvideo playback. It empowers you to speed up or slow down the clips. On thetechnical side it’s important to know that every media clip has a certain playbackspeed expressed in frame rate. Let’s assume you have a video clip with a normalspeed of thirty frames per second. The motion is life-like.Suppose you want to speed up the pace of the action two folds - make it movefaster twice. In this case, you will need to tell the program to cram all your thirtyframes in just a half a second time. Flip this concept and you will know how to slowdown things in your clip, make it twice slower - simply extend the thirty frames ofnatural motion throughout sixty frames of video.To reunite clips, select Unite. For the two clips to be successfully reunitedthey need to be of exactly the same duration and in corresponding positionsin the Timeline. This command is therefore usually limited to clips that werepreviously joined and then split.To remove a control point, drag it off the top or bottom of the clip. If youhold down the [SHIFT] key before adjusting the control points, you will seevalues (in dB and %) for the exact volume.
