Born and raised in Detroit, Demo played saxophone with the American soul/funk group, The Fabulous Counts and The Counts from 1968 until the band broke up in 1976. He continues to perform in the Toronto area and worldwide, and has released at least a dozen albums under his own name. He is known for his acting work on Blues Brothers 2000 (1998), The Busy World of Richard Scarry (1993) and A Raisin in the Sun (2008).