MacCoy's
system is notable for its staff with lines that are a minor third
apart. Although this possibility has been discussed, to our knowledge
this is the only system that has implemented it. As its name indicates,
Numbered Notes emphasizes the use of numbers for identifying pitches.
More information on Numbered Notes is also available from the Numbered Notes website.
This is a version of Keller's Express Stave that has a 6-6 pitch pattern
through a variation in the slant of the noteheads. Half of the
noteheads are sharply slanted while the other noteheads lie flat. This
6-6 pattern is "overlayed" over the 7-5 pitch pattern found in the solid and hollow noteheads, making it one of only a few systems that represent both (other examples are Diatonic Twinline by Leo de Vries and perhaps 6-6 Tetragram by Richard Parncutt).
TwinNote is Morris' version of Twinline
by Leo de Vries. It is similar to the versions of Twinline by Reed and
Keislar, but uses solid-oval and hollow-triangle notes to highlight the
6-6 pitch pattern and make notes easier to identify. This is also similar to Sotorrio's Bilinear
notation. Using solid-ovals gives quarter notes, eighth notes,
sixteenth notes, (etc...) a more consistent appearance when switching
back and forth from traditional notation. More information is also
available on the TwinNote website.
Expanded
TwinNote is designed as a companion notation for use with TwinNote.
They share the same line pattern and solid-or-hollow notehead pattern
making it easy to read either system interchangeably. The only
differences are TwinNote's vertically compact staff and use of
triangular noteheads.