Watch HDToday. "Fase" consists of three duets and one solo dance, choreographed to four repetitive compositions by the American minimalist musician, Steve Reich: Piano Phase, Come Out, Violin Phase and Clapping Music. Reich allows his tones to gradually shift in rhythm and melody and between the instruments. The choreography applies the same phase-shifting principle. The purely abstract movements are executed so perfectly that they seem almost mechanical and yet affect us in a strange way.