"The Disintegration Loops" features the last hour of daylight over New York City on September 11, 2001. It is composed and filmed by American avant-garde artist William Basinski.
the difference is the concept, not the instrumentation. these tracks are called the Disintegration Loops because each time the tape is looped, it degrades a little more; thus producing a different unique sound each time it repeats. it transcends the artist in a way, and i personally feel it lulls you into a trance.