Diesis
The diesis (/ˈdaɪəsɪs/ DY-ə-sis; plural dieses) most commonly refers to:
- The difference between two enharmonic notes in a scale. See Diesis (scale theory);
- 128/125 (≈ 41¢), the augmented comma or lesser diesis;
- rarely, 648/625, the diminished comma or greater diesis;
- A melodic unit of about that size. See Diesis (melodic unit).
Intervals with the word in the name:
- Magic comma, or small diesis
- Porcupine comma, or maximal diesis
- Tetracot comma, or minimal diesis
- 49/48, the large septimal diesis
Normal diesis
The normal diesis (≈ 38.7¢) is an interval size measure defined as one step of 31edo.