Just Intonationrefers to systems in which some fifths are tuned unacceptably small so that others may be pure.
Temperamentrefers to systems that distribute the impurities throughout the tuning. Of these,
Equal Temperamentdivides the octave into 12 equal half-steps, leaving all intervals except the octave slightly impure. (see tuning systems).
See S. Isacoff, Temperament: The Idea That Solved Music's Greatest Riddle (2001).
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
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