On Mr. Hands, Herbie Hancock guided listeners to uncharted terrain: A mix of synthesized soul, and electronic and acoustic instruments, it was a kitchen sink record on which the legend explored ambient textures and Afro-Caribbean jazz. As a result, Mr. Hands felt very much of the moment, a silky suite of turbulent jazz and understated bedroom funk tailored to Quiet Storm radio. When examined in today’s musical climate, where the lines between genres are more skewed than ever, Mr. Hands still sounds current, 40 years after it was first released.