For the recording, Reich used two normal Wollensak tape recorders with the same recording, originally attempting to align the phrase with itself at the halfway point (180 degrees). However, due to the imprecise technology in 1965, the two recordings fell out of synch, with one tape gradually falling ahead or behind the other due to minute differences in the machines and playback speed. Reich decided to exploit what is known as phase shifting, where all possible recursive harmonies are explored before the two loops eventually get back in sync before the end of the piece. The following year, Reich created another composition, Come Out, in which the phrase „come out to show them“ is looped to create the same effect.<\/p><\/blockquote>\n