A quarter tone is a musical pitch that is half the size of a half step or semitone. It represents a note that is one-quarter of the distance between two neighboring notes in Western music. Quarter tones are used to create subtle changes in pitch that are not found in the standard twelve-tone scale. They are often used in musical styles from regions like the Middle East and Eastern Europe to add unique tonal qualities and expressiveness to the music.

英語での「quarter tone」の定義と意味

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