"A central" note layout

This is a follow up to my previous blog entries regarding the note layout of the
Chameleon when using Carlos Gamma tuning system (see Gamma Chameleon Notation, Adagio Gamma Revisited, Gamma Elegy and Tetrachordal Gamma).

I have been developing the idea to have a single note always representing the “
prime unity” of my “Gamma” music (a concept borrowed from JI and Harry Partch and usually not associated with EDONOIs, short for “equal division of non octave intervals”!).

Gamma Chameleon Notation starts with the letter “A” I decided that “prime unity” would have to sound as an “A” pitch (440 Hz, 220 Hz, 110 Hz or any other one).

A central - note layout

So, if A0 is “prime unity” and sounds like an “A”, A1 will sounds like an “E” (3/2 above “A” ), A2 as “B” (3/2 above “E” ) and so on!
Notes without labels remain outside of the midi notes range.

If you compare this layout with that of
Tetrachordal Gamma, you will see that I had previously considered the bottom note of both leftmost and rightmost columns as the starting point of the layout (the note now called D#-1).

While playing with that layout I came to the conclusion that if there is a starting note it should stay in the middle and not on the sides of the keyboard and so this is how my Chameleon looks now.


...and that’s why I called this layout “A central”.
More to follow...