It has been eight years since Steve Tibbetts gave us the fiery electric guitar album “A Man About A Horse” (ECM 1814). Now he returns with a different kind of recording: an album of, primarily, acoustic sounds. The making of “Natural Causes” took place in a period when Tibbetts was reconsidering some fundamental aspects of his art and craft – in parallel with daily studies of Bach, Bartók, and music theory.