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Chapter 14. Music Tracks

Chapter 14. Music Tracks

Music tracks are very similar to Musical Instrument Digital Interface (MIDI) files—the music-industry standard for representing music.

Both music tracks and MIDI files consist of a sequence of commands specifying what sounds should be played and how they should be played. The sounds (called instruments) are not stored in the file. Instead, the commands are sent to a hardware or software synthesizer. In music tracks, QuickTime—which contains the instruments—functions as a software synthesizer.

Because the actual sounds are not in the file, both MIDI files and QuickTime music tracks are extremely small compared with digitized sound files.

Related to MIDI files are karaoke files, which essentially are MIDI files with text lyrics.

In this chapter, we’ll explain how to import or open MIDI and karaoke files; what changes you can make in music tracks within QuickTime Player; and how you can get QuickTime to use an external synthesizer, such as a MIDI keyboard or sound module. We’ll also show you how you can convert a music track back to a MIDI file.


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