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Learning aid for musical theory, comprises three discs divided into spirally and circular arrangement of sectors for teaching about intervals, harmony and church modes
Learning aid for musical theory, comprises three discs divided into spirally and circular arrangement of sectors for teaching about intervals, harmony and church modes
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机译:音乐理论的学习辅助工具,包括三个光盘,分为螺旋和圆形两个扇区,用于教授音程,和声和教堂模式
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摘要
A chromatic scale or another tone system comprising an array of equidistant tones rising in notes over more than octave pitch is arranged concentrically in the form of a spiral on a medium disc and is divided in the radial direction into a number of sectors (11-19) corresponding to the number of monoharmonically exchangeable tones per octave. A smaller rotatable disc placed concentrically inside the medium disc is also divided into the same number of sectors arranged as a spiral with the musical interval terms relative to a given field in a sector. The smaller disc has a circle with terms or markings for identifying the chord in the root position and its inversions relative to a given field in a sector. Both discs are mounted on a large disc divided into the same number of sectors arranged in a circle, which contain labels or markings for identifying the scale.
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