In a green card folding case, this CD contains one track consisting of 17 concerts by leading composers of the 20th century, ranging from Cage to Xenakis, 'simultaneously performed' (punderphonically).The quartet, un-named on the CD, then performed individually, without listening to one another, mixing their tracks down to make an 18th work, mixed in with the rest. The result is a kind of ideal, massive Xenakis-like (but better, much better) symphonic roar that makes a perfect plea for the spirit of the first 2/3 of C20 music. It really is completely great. And likely to vanish. A great plunder classic.