Who produced the documentary film Moog in 2004, about a pioneer of sound using electronic circuitry and digital devices?
Electronic musical instrument An electronic musical instrument is a musical instrument that produces sound using electronic circuitry and/or digital devices. Such an instrument sounds by outputting an electrical, electronic or digital audio signal that ultimately is plugged into a power amplifier which drives a loudspeaker, creating the sound heard by the performer and/or listener.
Motiograph Motiograph was a film equipment company. Their products included projectors and speakers. The company went out of business.