The inventor explicates that a listener has impressions of "stability" with short "timing cycles" and "instability" with long "timing cycles" as to a scale, a melody, a chord, a chord for a main chord, and successive chords of music. 音楽の、音階、旋律、和音、主和音に対する和音、前後の和音における短い「同期周期」は「安定」との、長い「同期周期」は「不安定」との印象を聴く者に与えることを発明者は解明した。 - 特許庁