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half step

From Wiktionary, the free dictionary
See also: half-step

English

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Each of the keys on a piano (black or white) is one semitone higher than the one immediately to the left.

Noun

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half step (plural half steps)

  1. (music, US) The distance between two tones. In 12-tone equal temperament, its frequency ratio is , or about 1.059 or 18/17.
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