Steve Reich's Music for 18 Musicians is one of the pillars of American Minimalism. It was written in 1976 for an ensemble of four pianos, strings, clarinet, mallet instruments and women's voices.
These musicians navigate a sonic voyage that demands total immersion from listeners; and the subsequent trip or trance can be almost frighteningly irresistible.
The cantankerous Robert Christgau, the self-styled dean of rock critics, was very taken with Reich's mix of the mathematical and the organic here, even if it was "uplifting at best, calming at normal, and Muzaky at worst".
Yet four decades have not dimmed or tarnished its gleam. A CD of Music by Brad Lubman and his Ensemble Signal, the sixth since Reich's 1978 ECM recording, affirms its masterpiece status.
The Signal musicians lay out their philosophies in a mission statement that emphasises the diversity of their playlists, together with the need to work with music for which there is a pressing need in contemporary cultural life.