Apple Final Cut Pro 7 - Manual (Page 893)

Using Faders to Adjust Audio Levels
Final Cut Pro stores audio level information in clips, not in tracks. When you adjust faders
in the Audio Mixer, you affect only the clips currently beneath the playhead. This is the
same as adjusting a clip’s audio level directly in the Timeline or Viewer.
Changes made to faders
in the Audio Mixer...
...affect only the audio
clip items below the
playhead in the Timeline.
If an audio track at the position of the playhead does not contain a clip, the fader
corresponding to that track is automatically set to –
∞ dB (total silence), and you are
unable to move the fader slider.
You can change the audio levels of clips in the Timeline while the sequence is playing or
while it is paused. If the Record Audio Keyframes option is turned off, adjusting a fader
level does not add keyframes but instead adjusts the audio level for the clip’s entire
duration. If the clip already has keyframes, the level is adjusted between the previous
and subsequent keyframes.
You can also select the Record Audio Keyframes checkbox in the Editing tab of the User
Preferences window.
893 Chapter 56 Using the Audio Mixer