The sori () is a symbol that corresponds to a quarter step higher in tone in Persian traditional music. It is written as a ">" sign, crossed by two vertical lines, and can be used like an accidental.
In the early 20th century, Iranian master musician Ali-Naqi Vaziri established this sign for the sori for use in written Persian music using standard western notation.
Character representation of this accidental together with the koron microtone used in modern Iranian classical music were added to the Unicode standard in Version 14.0 as U+1D1E9 and U+1D1EA, respectively.
See also Persian traditional music Dastgah Quarter tone koron
External links Persian accidentals in the SMuFL glyph (Standard Music Font Layout)
References