tick tock, baby

BBC NEWS: First Notes For 639-year Composition

The first notes in the longest and slowest piece of music in history, designed to go on for 639 years, are being played on a German church organ on Wednesday.

The three notes, which will last for a year-and-a-half, are just the start of the piece, called As Slow As Possible.

Composed by late avant-garde composer John Cage, the performance has already been going for 17 months - although all that has been heard so far is the sound of the organ's bellows being inflated.

The music will be played in Halberstadt, a small town renowned for its ancient organs in central Germany.

It was originally a 20-minute piece for piano, but a group of musicians and philosophers decided to take the title literally and work out how long the longest possible piece of music could last.

They settled on 639 years because the Halberstadt organ was 639 years old in the year 2000.