The Disintegration Loops are four albums by William Basiniski released in 2002/2003.
TDL came to be through Basinski's attempts to digitize old recordings made on magnetic tape. As the magnetic tapes were being transferred they begin to slowly fall apart which produced the effect you can hear. The recording of the tapes finished on the morning of the September 11 attacks on the World Trade Center. He then spent the rest of the day recording the video of smoke billowing from the tower and listening to the tapes.
I find it to be an absolutely beautiful art piece about time and decay that coincides elegantly with 9/11. The music falls apart at such a slow pace that you cant realize the differences until the end. Or at least I cant.