John Cage
Photo: Rob Bogaerts for Anefo, CC0 (resized). Source: Wikimedia Commons, commons.wikimedia.org/wiki/File:John_Cage_(1988).jpg
Instruments:
Synthesizer, Electronics
Photo: Rob Bogaerts for Anefo, CC0 (resized). Source: Wikimedia Commons, commons.wikimedia.org/wiki/File:John_Cage_(1988).jpg