The
Double Sextet is in three
movements, lasting about 22 minutes in its entirety: The piece is strongly driven by the two
pianos and the two
vibraphones, marking out each phrase and key change, particularly in the fast movements. Within each movement are four harmonic sections in the keys of D, F, A and B (or their
relative minors), similar to many of Reich's works; the reason being that the sections eventually return to the original key. The interlocking piano rhythm themes occur throughout the piece. The pianos interlock, creating the effect of constant eighth-note chords. ==Performance==