User:CompactStar/Quasi-diatonic MOS notation

Quasi-diatonic MOS notation (QDMN) is a JI-agnostic microtonal notation system for MOS scales developed by CompactStar. It is optimized specifically for backwards-compatibility with existing diatonic (5L 2s) notation. For diatnoic, it is identical to standard notation.

Note and interval names

The note name ABC... are used as the naturals for every MOS and repeat at the MOS's equave. A4 is fixed to 440 Hz, and the scale of naturals starting on B is fixed to the MOS's darkest mode.The accidentals #/b are set to raise and lower by the chroma (L-s).

A generic interval spanning k steps is referred to as a (k+1)th. In order to specify an interval, the qualities diminished, minor, perfect, major and augmented are used. For the larger of the two generators (like the perfect fifth in diatonic), the large size of its generic interval is perfect and the small size of its generic interval is diminished. For the smaller of the two generators (like the perfect fourth in diatonic), the large size of its generic interval is augmented and the small size of its generic interval is perfect. For any other generic intervals, the large size is major and the small size is minor. Since a term like "minor 3rd" are ambiguous depending on MOS, prefixes from TAMNAMS can optionally be used to disambiguate, such as "minor oneiro3rd" for the small interval spanning 2 steps in 5L 3s.

Staves

The MOS scale used should be given at the top in any sheet music for clarity. The staff has round(n/2+1) lines for an n-note scale. The naturals represent the lines and spaces of the staff with no accidentals. The clefs are the same as in diatonic ( G-clef, C-clef, and F-clef) and work identically, just with G, C, and F being the notes in the respective MOS instead. For the rare case of 1L 1s, the note C does not exist and a nonstandard clef such as VectorGraphics' A clef can be used.