Talk:Diesis (scale theory): Difference between revisions

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 : Nah, the diesis is always positive (in size, not in diatonic degrees!) cuz it essentially refers to a distance. The "negative" modifier is confusing anyway so I'd recommend against attaching it to an interval name. —[[User:FloraC|FloraC]] ([[User talk:FloraC|talk]]) 16:43, 10 April 2026 (UTC)
+:: This is the scale theory diesis, not the interval region. Having the diesis be always positive in span introduces an inconsistency: if you have d2 to be the diesis in all diatonics, you can confidently say that C# + diesis = Db in all cases, resulting in a movement up the scale, down two chromas; but that will necessarily create negative dieses in hard diatonic (there are hundreds of instances of "negative" being used (mostly commas...)). Extending to all MOS scales, the mosdiesis is small step minus chroma (2s-L).
+::IF instead you declare the diesis to be d2 or -d2, whatever spans positively, then C# + diesis = Db doesn't always hold, introducing an inconsistency in the diatonic: does the diesis go up or down the scale?
+::Besides, having the diesis allow sign within the confines of its MOS range allows both the positive and negative dieses to have different functions and be treated distinctly; and in the case of meantone and schismic, they very often '''do''' serve different functions. --[[User:Eufalesio|Eufalesio]] ([[User talk:Eufalesio|talk]]) 18:58, 10 April 2026 (UTC)