Pitch class: Difference between revisions
removed obsolete categories; added nonoctave info |
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In terms of frequencies expressed in hertz, assuming a base frequency for middle C of 262 Hz, this would be {... 65.5, 131, 262, 524, 1028 ...}. In terms of midi note numbers, we can write it as {... 36, 48, 60, 72, 84 ...}. | In terms of frequencies expressed in hertz, assuming a base frequency for middle C of 262 Hz, this would be {... 65.5, 131, 262, 524, 1028 ...}. In terms of midi note numbers, we can write it as {... 36, 48, 60, 72, 84 ...}. | ||
In a [[nonoctave]] xenharmonic system, an interval other than the octave might be used to define equivalence. For example, in [[Bohlen-Pierce]] tuning, all pitches separated by a whole number of tritaves (3/1) may be considered equivalent. | In a [[nonoctave]] xenharmonic system, an interval other than the octave might be used to define equivalence. For example, in [[Bohlen-Pierce]] tuning and other [[edt|equal divisions per tritave]], all pitches separated by a whole number of tritaves (3/1) may be considered equivalent. | ||
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