Working with Audio Tracks
QuickTime audio includes music tracks, which contain MIDI or other data, and sound
tracks, which contain digitized audio.
Adding an Audio Track to a QuickTime Movie
You can easily add audio and other tracks to a QuickTime movie.
To add an audio track to a movie:
In QuickTime Player, choose File > Open File and select the audio file you want to
In the QuickTime Player window that opens, choose Edit > Select All to select the entire
audio file, then choose Edit > Copy.
Open the movie to which you want to add the audio.
To add the audio to the whole movie, choose Edit > Add. To add the audio to a part of
the movie, select a part and choose Edit > “Add to Selection and Scale”.
“Add to Selection and Scale” slows down or speeds up the audio track to fit the length
of the selected part of the movie; the pitch remains the same (when you play the
movie in QuickTime Player). You could add video to sound instead, and speed up or
slow down the video to match the audio. You might have better results if you compare
the timelines of the two tracks and cut from one or the other until they have the same
Editing and Authoring with QuickTime Pro
Note: If your audio and video are created by the same device, such as a DV camera,
and are created at the same time, the audio and video will be synchronized.
Changing Sound Track Volume Levels and Other Audio Settings
With QuickTime Pro, you can change the volume and balance of audio and music
tracks. For example, if a movie has more than one audio track, you can adjust the
volume of the tracks relative to one another. You can also change the bass and treble
To change settings for an audio track:
In QuickTime Player, choose Window > Show Movie Properties.
In the Properties window, select the audio track and click Audio Settings.
Drag the sliders to adjust the settings.
Use the pop-up menu to the right of each audio channel to specify where the channel’s
sound should be directed.
To direct a channel's sound to the subwoofer, choose LFE Screen. To specify a particular
output for the audio device, choose one of the Discrete options. To silence a channel,
To turn off the audio (without having to delete the track), select Mute. To play only the
selected audio track, select Solo.
To save the balance and channel settings with your movie, choose File > Save or