Diesis

The diesis (/ˈdaɪəsɪs/ DY-ə-sis; plural dieses) most commonly refers to:

• The augmented comma 128/125 (≈ 41¢).
• A melodic unit of about that size. See Diesis (melodic unit).
• The difference between two enharmonic notes in a scale. See Diesis (scale theory).

English Wikipedia has an article on:

Diesis

Intervals with the word in the name:

• Greater diesis, 648/625
• Small diesis, aka magic comma
• Minimal diesis, aka tetracot comma
• Septimal diesis, 49/48

Normal diesis

The normal diesis (≈ 38.7¢) is an interval size measure defined as one step of 31edo.

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