Number Pieces

The term Number Pieces refers to a body of late compositions (40, or 41 if "Seventeen" was actually composed) by John Cage. Each piece is named after the number of performers involved: for instance, "Seven" is a piece for seven performers, "One9" (read "One Nine") is the ninth work for one performer, and "1O1" is a piece for an orchestra of 101 musicians. The vast majority of these works were composed using Cage's time bracket technique: the score consists of short fragments (frequently just one note, with or without dynamics) and indications, in minutes and seconds, during which the fragment can start and by what time it should end. Time brackets can be fixed (e.g. from 1.15 to 2.00) or flexible (e.g. from anywhere between 1.15 and 1.45, and to anywhere between 2.00 and 2.30).
All of the Number Pieces were composed during the last six years of Cage's life, 1987–1992. Most are for traditional instruments, with six exceptions that range from works for rainsticks, the Japanese aerophone shō and conch shells to an electronically amplified version of "4′33″". This article lists all Number Pieces, organized by number of performers.
List of Number Pieces.
Twenty to 108.
Cage's late orchestral works are to be performed without a conductor.