Interval modifiers in various systems

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User:PiotrGrochowski/Extra-Diatonic Intervals—this is based on 43edo. Unlike many other size based naming systems, it has an augmented unison and diminished octave. It uses second–third, third–fourth, fifth–sixth and sixth–seventh as 43edo splits the minor second (between major second and minor third, major third and the fourth, etc.) in half.

It uses high and low modifiers.

  • Neutral intervals (neutral second, third, sixth and seventh) are split in two. These are labeled high and low.
  • Highs and lows as a modifier is used on many intervals, and raises or lowers an interval by one 43edo step. One step in 43edo is a meantone diesis, which has similar septimal functions as super and sub in some systems.