In 1974 he moved to San Diego where taught singing out of a private studio until his death ten years later of a heart attack .
In the early 1970s Cunningham was a member of the voice faculty at the University of Utah in Salt Lake City .
In 1974 Cunningham moved to San Diego where taught singing out of a private studio until Cunningham 's death ten years later of a heart attack .
In the early 1970s Cunningham was a member of the voice faculty at the University of Utah in Salt Lake City .