Since he began making music in the late '60s, Jamaican singer Horace Andy has been known for the haunting, arresting qualities of his vocals, which add a tinge of mystery and longing to even his most straightforward material. His voice was the guiding force of roots reggae hits like 1972's "Skylarking," and along with albums of his own that explored dub and dancehall styles through the '80s, Andy was prominently featured on select songs by trip hop pioneers Massive Attack on their genre-defining '90s albums. He made music consistently as the years went on, collaborating with a...