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Music Theory for Computer Musicians by Michael Hewitt

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15. Expanding your Knowledge of Keys

Music composers generally write their music in a key. An example of a key with which you are already familiar is C major. Other examples are A minor, F major, and so on. To write music with any proficiency, you need knowledge both of individual keys and of the system to which they belong. This applies to whatever type of music you are writing.

A glance at any popular songbook will show music written in a variety of keys. And when mixing, a DJ needs a certain degree of key awareness—an awareness that is honed to its maximum within the process known as harmonic mixing.

When writing tunes, knowledge of the key system is essential. You need to know what key the music is in and be comfortably familiar with the ...

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