HALBERSTADT – Hundreds of fans attended a special kind of musical happening Saturday at a church in Germany: a chord change in an organ piece that is supposed to last for an entirety of 639 years.The performance of the “ORGAN/ASLSP,” or As Slow As Possible, composition began in September 2001 at the St.
Burchardi Church in the eastern town of Halberstadt and is supposed to end in 2640 — if all goes well.The music piece by the American composer John Cage is played on a special organ inside the medieval church.