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User’s Guide
• 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.