Four About Four, No. 1 EP
The series Four About Four are a group of four note pieces that explore the fact that four notes can be arranged only twenty four ways without repeating a note. After an arrangement of four notes is used it cannot be used again.
Three About Three is similar but is further restricted by the fact that three notes can only be arranged six ways.
The original idea, and pieces composed in this manner, come from 1991 as a composition undergrad and were re-explored starting in 2010.