In the 1960s, with Terry Riley and Philip Glass, Reich gave pulse back to experimental music, he discovered tape-based techniques of looping and phasing using recordings of fragments of speech, and then molecules of musical material.

(...)When Steve Reich released Music for 18 Musicians (ECM, 1978), it was a consolidation and major leap forward in the pulse-based music that the minimalist progenitor had been exploring on earlier compositions including Four Organs' (1969), a piece that relied on nothing more than a six-note chord, yet was a near flat-out sonic assault. 18 Musicians was an altogether more complex and sophisticated work, with a broader textural palette based largely on tuned percussion—piano, vibraphone, marimba and xylophone—but also working with maracas, voice, strings, and clarinets to create a sweeping, hour-plus long suite that was hypnotic, melodic, and eminently accessible. With the mathematical precision by which its eleven sections and wrapping Pulses' develop, it's a demanding suite to play (...)"