In music, septimal diesis (or slendro diesis) is an interval with the ratio of 49:48 [citation needed] , which is the difference between the septimal whole tone and the septimal minor third. It is about 35.7 cents wide, which is narrower than a quarter-tone but wider than the septimal comma. It may also be the ratio 36:35,[1][2][3] or 48.77 cents.
- ^ Haluska, Jan (2003). The Mathematical Theory of Tone Systems, p.xxv. ISBN 978-80-88683-28-5.
- ^ "Stichting Huygens-Fokker: List of intervals". Huygens-fokker.org. Retrieved 2013-10-18.
- ^ "Wendy Carlos Beta scale". Microtonal-synthesis.com. Retrieved 2013-10-18.