Phasor (sound synthesizer)

Phasor is a stereo music, sound and speech synthesizer created by Applied Engineering for the Apple II family of computers. Consisting of a sound card and a set of related software, the Phasor system was designed to be compatible with most software written for other contemporary Apple II cards, including the Sweet Micro Systems Mockingboard, ALF's Apple Music Synthesizer, Echo+ and Applied Engineering's earlier card Super Music Synthesizer.