12.27 Just scale; scale of Just intonation. Musical scale formed by setting the major triads to have the frequency ratio 4:5:6 and the minor triads to have ratios of 10:12:15, which makes major and minor triads as consonant (smooth) as possible. Annotation...
12.26 Pythagorean scale. A musical scale that creates the greatest number of perfect fifths and fourths (having frequency ratios of 3/2 and 4/3 respectively). Annotation See Table...
12.25 scale. Series of notes (symbols, sensations, or stimuli) arranged from low to high by a specified scheme of intervals, suitable for musical purposes.
12.24 cent. Unit denoting a fraction of a semitone. 1 semitone = 100 cents. Annotation One octave is 1200...
12.23 semitone. Unit of interval between tones of different frequency, on a scale of log base 2. A semitone corresponds to a frequency ratio of 2 1/12 = 1.059. Annotation Tone...
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