![Matthew Anderson on Twitter: "John Cage's "Organ²/ASLSP (As Slow as Possible)" has been playing on the organ of a church in Halberstadt, Germany since 2001. (The performance runs until 2640.) This Saturday, Matthew Anderson on Twitter: "John Cage's "Organ²/ASLSP (As Slow as Possible)" has been playing on the organ of a church in Halberstadt, Germany since 2001. (The performance runs until 2640.) This Saturday,](https://pbs.twimg.com/media/Eg6GU8GXsAkUb9d.png)
Matthew Anderson on Twitter: "John Cage's "Organ²/ASLSP (As Slow as Possible)" has been playing on the organ of a church in Halberstadt, Germany since 2001. (The performance runs until 2640.) This Saturday,
![Piece of music lasting for 639 years has first chord change since 2013 | The Independent | The Independent Piece of music lasting for 639 years has first chord change since 2013 | The Independent | The Independent](https://static.independent.co.uk/s3fs-public/thumbnails/image/2020/09/06/11/organ-john-cage-germany.jpg)
Piece of music lasting for 639 years has first chord change since 2013 | The Independent | The Independent
![The world's slowest musical composition, John Cage's 'As Slow as Possible,' changes chord for first time in seven years | CNN The world's slowest musical composition, John Cage's 'As Slow as Possible,' changes chord for first time in seven years | CNN](https://media.cnn.com/api/v1/images/stellar/prod/200907084239-03-john-cage-organ-art-project-chord-change-restricted.jpg?q=x_3,y_277,h_1516,w_2694,c_crop/h_720,w_1280)