Dalmazio Santini

Hi,

in a random Wikipedia article I saw a reference to a "well-known American composer" that I have never heard of, Dalmazio Santini, so I had to look him up (http://en.wikipedia.org/wiki/Dalmazio_Santini).

This is what it says about his serial system:

Santini developed a system of composition using 21-tone rows. This system is similar to the more familiar 12-tone system of serial composition, but the rows Santini used as the basis of his 21-tone compositions also include all alternative enharmonic spellings for each note in the chromatic scale (except the notes D, G, and A, which have no enharmonic spellings). Thus, the available tones for a 21-tone row would include B-sharp, C, C-sharp, D-flat, D, D-sharp, E-flat, E, F-flat, E-sharp, F, F-sharp, G-flat, G, G-sharp, A-flat, A, A-sharp, B-flat, B, and C-flat.

There is no menrion of how these pitches are distunguished (or not). Is anybody able to shed some light on this?

He also used quarter tones in other pieces, so I suspect it is indeed some microtonal system.

klaus