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Story summary
- The John Cage Organ Project in Halberstadt marked its 17th chord change on Wednesday by adding an A4 pipe.
- The eight-note chord represents roughly 4 % of the 639-year composition that began on 5 September 2001.
- The next chord change is scheduled for 5 October 2027, when the E4 pipe will be removed.
- Inheritable “final tickets” for the 4 September 2640 finale are priced at €2,640 ($3,045).
