Accidentals in the 9/8 space. First sketch by Aura.Accidentals in the 9/8 space. Reworked version.
The 159edo-notation system proposed by Aura modifies the Helmholtz-Ellis notation in such a way that undecimal quartertones play a central role alongside the traditional accidentals. It should be noted that most of the symbols listed on this chart derive their functions from JI, though the dart symbols in particular have the potential to see usage in later versions of Ups and Downs notation.
The following table (under construction) shows the symbols and describes their function. The terms in the glyph name sections reflect absolute displacements, - means down, + means up. Furthermore, symbols with multiple names will have both names sharing the same cell. The choice between the primary and secondary glyphs for any given step is often determined both by absolute TE error and by harmonic and melodic context for any given score, particularly as the primary and secondary glyphs reflect different intervals in Just Intonation.
Change in 1\159
Delta
Primary Glyph
Primary Glyph Name
Secondary Glyph
Secondary Glyph Name
Remarks
0
Natural
-1
Dart down
This is nothing more than a better version of the v marking from Ups and Downs Notation.
+1
Dart up
This is nothing more than a better version of the ^ marking from Ups and Downs Notation.
-2
Double dart down
This is two darts down fused into a single glyph for a more compact representation of vv from Ups and Downs Notation.
+2
Double dart up
This is two darts up fused into a single glyph for a more compact representation of ^^ from Ups and Downs Notation.
