, an electronics pioneer whose creations of MIDI and the Prophet 5 synthesizer revolutionized popular music, died in Detroit. He was 72 and experienced a heart attack while attending the Movement electronic music festival, which ran May 28-30.
He founded his own company, Sequential Circuits, in 1974, and it is still operating in San Francisco at the time of his death. Smith later developed MIDI in 1982. MIDI is a technical standard that allows music equipment to work in tandem by sending and receiving data signals via a universal cable connection. It became an industry standard that is still widely used today.