Not all music uses equal-tempered scales. In fact, even AE has used
alternative tunings in some of their tracks (e.g. arch carrier on LP5).
To someone immersed in equal temperament as most of us are, such scales
sound vaguely out-of-tune, yet there can be an odd sense of harmonious-
ness missing from equal-tempered tunings (at least in keys compatible
with the tuning).
Equal temperament is the ONLY tuning system where enharmonic keys are
equivalent. It facilitates, but isn't necessary for, chromaticism.
(Check a good music dictionary for definitions of the latter word, and
other such terms.)
Back to your regularly scheduled program...
-Ed
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