Entertainment / Music / Diatonic: Melody or harmony built from the seven tones of a major or minor scale. A diatonic scale encompasses patterns of seven whole tones and semitones.
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Entertainment / Music / Third: Interval between two notes that are two diatonic scale steps apart. MORE
Technology / Home Audio / Octave: In audio, the interval between any two frequencies having a ratio of 2 to 1. One octave up from 100 Hz is 200 Hz, where one octave down from 100 Hz is 50 Hz. A harmonic is a doubling (2nd harmonic), t MORE
