In music, a breedsma is an interval between pitches with the ratio of 2401:2400,[1] which is the difference between the septimal diesis (49:48, also known as Slendro diesis) and the septimal sixth-tone (50:49, also known as jubilisma).[2] It is about 0.72 cents ( Play ).

2401/2400 = 128/75 / (8/7)4
2401/2400 = (7/6)4 / 50/27

It is therefore the difference between one kind of classic diminished seventh and four septimal major seconds, or four septimal minor thirds and one kind of classic major seventh.


  1. Haluska, Jan (2003). The Mathematical Theory of Tone Systems, p.xxviii. ISBN 80-88683-28-9.
  2. Manuel Op de Coul. "List of intervals". Stichting Huygens-Fokker.
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