"John Cage's 639-Year-Long Organ Piece Shifts Chord"

The 639-year-long composition "As Slow as Possible" by avant-garde composer John Cage, played on a specially built mechanical organ in a church in Germany, changed chord for the first time in two years, drawing crowds to witness the rare moment. The experimental piece, which began in 2001, is not set to finish playing until the year 2640 and has now had 16 chord changes. The composition, designed to be played as slowly as possible, has garnered significant attention, with some people booking tickets years in advance to experience the chord change.