•Vallotti & Young chrom: a twelve-tone scale. Another derivative of the Pythagorean scale designed to allow arbitrary keys.
•Barnes-Bach (chromatic): a twelve-tone scale. A variation of the Vallotti & Young scale designed to optimize the performance of Bach’s Well-Tempered Clavier.
Ethnic Tunings
•Indian: This 22-tone scale is used in India to perform ragas.
•Slendro: This five-tone Indonesian scale is played by ensembles called gamelans.
•Pelog: This seven-tone Indonesian scale is more interesting than Slendro and is now the primary scale in Balinese music.
•Arabic 1: This 17-tone scale is the original Arabic scale adopted from the Pythagorean scale.
•Arabic 2 (chromatic): This twelve-tone scale is the modern version of the Arabic scale popular in Arabic music today.
Contemporary Tunings
Equal-tempered scales with a large number of tones are typically used to play common tonal harmony with greater purity of intervals and chords. The typical approach is to analyze a passage (or less) of music and select tones from a scale that will best approximate the desired pure intervals.
•19 Tone: This scale has greater purity of minor thirds and major thirds (and conversely, minor and major sixths) than twelve-tone equal temperament. A disadvantage is that perfect fifths are narrower than those found in twelve-tone equal temperament.
