From the minimalism New York community of the sixties. John Cale was a member of the Velvet Underground rock group.
Think of it as an extreme version of Reich's Four Organs. Sounds as if bricks are stuck on the organ keyboard. But interesting nonetheless. Not for minimalism haters.
Ken Clark says:
This piece really starts to grow on you after repeated listenings if you can survive that far.
Luke Buckman says:
...at 42 minutes, it's an endurance test no matter who's listening. However, for those willing to provide full attention and look past the somewhat lo-fi sound, it can be a meditative piece of work filled with vibrating textures and radiating intensity.
Update: Although this piece was written in the United States, of course, John Cale is Welsh.