(Greek: "in proper attunement")
In ancient Greek music theory, one of the 3 types of genera, along with diatonic and chromatic. The enharmonic had the largest characteristic interval and the smallest pyknon, and was characterized by containing quarter-tones. The name was applied to one type of semitone in the work of Marchetto of Padua. In modern times it has come to refer to the equivalence of a nominal-plus-sharp with the next-higher-nominal-plus-flat (i.e., A# = Bb). See:
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