Pythagorean—an adjective describing the construction of a scale or musical system by successions of 3-to-2 ratios or just perfect fifths
Just Intonation—any tuning that incorporates five or more acoustically pure types of interval within the octave; such as on acoustically pure major thirds and acoustically pure fifths. It is not possible to construct a diatonic scale in which both fifths and thirds are pure
Meantone—two just intonation whole tones (with ratios of 9:8 and 10:9) are conflated into one “mean tone” which lies between the two, the objective being to produce or approximate just intonation major thirds
Just Intonation—any tuning that incorporates five or more acoustically pure types of interval within the octave; such as on acoustically pure major thirds and acoustically pure fifths. It is not possible to construct a diatonic scale in which both fifths and thirds are pure
Meantone—two just intonation whole tones (with ratios of 9:8 and 10:9) are conflated into one “mean tone” which lies between the two, the objective being to produce or approximate just intonation major thirds
Well temperament—intervals between degrees are unequal; the members of various chords approximate just ratios to various degrees of accuracy, depending on the root
Equal temperament—based on a scale whose steps have logarithmically equal intervals between them, in contrast to the differently-spaced degrees of just intonation, meantone or well-temperament
Equal temperament—based on a scale whose steps have logarithmically equal intervals between them, in contrast to the differently-spaced degrees of just intonation, meantone or well-temperament
