This is not a work Cage actually composed, but it is suggested in the subtitle and performance instructions of
Cartridge Music.
In the performance instructions Cage indicates connecting a contact microphone to the instrument. He suggests the use
of sheet 1, making readings as in Cartridge Music. Where change of object is indicated, the cymbal should be
lowered into water or onto piano strings, a mat or other materials in order to change the sound radically.
The subtitle of Cartridge Music ("also DUET FOR CYMBAL and PIANO DUET, TRIO etc."),
also suggests other possible combinations of instrument(s).
Sources: Richard Kostelanetz: John Cage: Writer - Previously uncollected pieces; Published score