21/1: Difference between revisions

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-'''21/1''', the '''21st harmonic''', is the [[harmonic]] past [[20/1]] and before [[22/1]]. It is about four [[octave]]s and five [[semitone]]s in size. Used in harmony, it sounds particularly wide: if the lower note is C2, the higher note will be about F6. Think of a soprano and a bass at their extremes. However, it can be approached as a stack of [[3/1]] and [[7/1]], making [[chord]]s like 1-3-21, 1-7-21, or 1-3-7-21.
+'''21/1''', the '''21st harmonic''', is the [[harmonic]] past [[20/1]] and before [[22/1]]. It is about four [[2/1|octaves]] and five [[semitone (interval size measure)|semitone]] in size. Used in harmony, it sounds particularly wide: if the lower note is C2, the higher note will be about F6. Think of a soprano and a bass at their extremes. However, it can be approached as a stack of [[3/1]] and [[7/1]], making [[chord]]s like 1-3-21, 1-7-21, or 1-3-7-21.
 == See also ==