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QUARTER TONES

Quarter-tone notation in Western music is not standardized. A common notation involves writing the fraction 1/4 next to an arrow pointing up or down. Below are examples of an alternative notation:

– Demi-flat
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Lowers the pitch of a note by one quarter tone. (Another notation for the demiflat is a flat with a diagonal slash through its stem. In systems where pitches are divided into intervals smaller than a quarter tone, the slashed flat represents a lower note than the reversed flat)

– Flat-and-a-half (sesqui-flat)
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Lowers the pitch of a note by three quarter tones.

– Demi-sharp
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Raises the pitch of a note by one quarter tone.

– Sharp-and-a-half (sesqui-sharp)
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Raises the pitch of a note by three quarter tones. Occasionally represented with two vertical and three diagonal bars instead. Other conventions for microtonal music are used on an ‘ad hoc’ basis.

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