Cartridge Music is for amplified "small sounds"; any number of players and loudspeakers; parts to be prepared from score by performers.
Readings are taken which are useful in performance, enabling one to go about his business of making sounds.
A cartridge is an ordinary phonograph pick-up in which customarily a playing needle is inserted.
This is a composition indeterminate of its performance, and the
performance is of actions which are often indeterminate of themselves.
The sounds which result are noises, some complex, others extremely simple.
All sounds, even those ordinarily thought to be undesirable, are accepted in this music.