Diesis - Septimal and Undecimal Diesis

Septimal and Undecimal Diesis

The septimal diesis (or slendro diesis) is an interval with the ratio of 49:48 play, which is the difference between the septimal whole tone and the septimal minor third. It is about 35.70 cents wide

The undecimal diesis is equal to 45:44 or about 38.91 cents, closely approximated by 31 equal temperament's 38.71 cent interval.