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Chapter 12. Working with Audio Tracks

Chapter 12. Working with Audio Tracks

Don’t forget the audio! Audio is an often-overlooked component of multimedia; some media creators focus so much on the video that they forget about the audio. However, sound makes a big difference: It’s been shown that better sound quality often makes people believe that the video image is of higher quality than identical movies with poorer quality sound.

When we use the term audio, we’re referring to tracks that you can hear. QuickTime has two primary types of audio tracks:

  • Tracks that contain digitized sound. The most common tracks of this type are sound tracks, although MPEG1 audio tracks also contain digitized sound.

  • Tracks that comprise a sequence of commands that tell QuickTime how to play sounds called instruments. Based on the MIDI standard, these tracks are called music tracks.

In this chapter, we’ll cover techniques that apply to all types of audio tracks, combining them with video or still images and altering the volume, balance, bass, and treble.

In the chapters that follow, we’ll discuss sound and music tracks individually.


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