Minimal Music - Early Development

Early Development

The music of Moondog of the 1940s and '50s, which was based on counterpoint developing statically over steady pulses in often unusual time signatures, had a strong influence on many early minimalist composers. Philip Glass has written that he and Reich took Moondog's work "very seriously and understood and appreciated it much more than what we were exposed to at Juilliard".

In 1960, Terry Riley wrote a string quartet in pure, uninflected C major. In 1963, Riley made two electronic works using tape delay, Mescalin Mix and The Gift, which injected the idea of repetition into minimalism. In 1964, Riley's In C made persuasively engaging textures from layered performance of repeated melodic phrases. The work is scored for any group of instruments. In 1965 and 1966 Steve Reich produced three works—It's Gonna Rain and Come Out for tape, and Piano Phase for live performers—that introduced the idea of phase shifting, or allowing two identical phrases or sound samples played at slightly differing speeds to repeat and slowly go out of phase with each other. Starting in 1968 with 1 + 1, Philip Glass wrote a series of works that incorporated additive process (form based on sequences such as 1, 1 2, 1 2 3, 1 2 3 4) into the repertoire of minimalist techniques; these works included Two Pages, Music in Fifths, Music in Contrary Motion, and others. By this point, development of a minimalist style was in full swing.