I recently had a discussion with someone about the use of the term “perfect” when labeling the intervals of a fourth and a fifth. As mentioned in my last post, these intervals are perfect consonances. However, unlike octaves and unisons, fourth and fifths can be altered. The label “perfect” is used to distinguish the consonant form of these intervals from the diminished or augmented forms.
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Ray Melograne received his BA and ME in music education from Queens College. He is currently teaching music in the NY public schools. He also teaches privately on the Zoen.com network.