Koron
A koron is an accidental that lowers the pitch by a quarter-tone. The koron was designed by Ali-Naqi Vaziri (1886-1979).
Context
The Dastgah Concept in Persian Music, Dastgāh-e Šur, Dastgāh-e Abuatā, Dastgāh-e Dašti, Dastgāh-e Afšāri, Dastgāh-e Segāh, Dastgāh-e Čahārgāh, Dastgāh-e Homāyun, Dastgāh-e Bayāt-e Esfahān, Dastgāh-e Navā