This is perhaps one of the most important documents of American Music ever recorded, the Composer John Cage will undoubtedly be veiwed in future eras as not only the most important American composer of all time, but one of the most important Composers of all time. Until this time, also the work of Edgard Varese, Pierre Schaeffer and Karlheinz Stockhausen, all music in "the west" written after Bach could have been found in Bach, it was even said if all music was lost as long as Bach remained it could all be discovered again. Here's where everything changes. To really appreciate Cage's music it is best to hear him or David Tudor perform or "conduct" it, they are both onboard here for this excellent three C.D. set. Most of Cage's major works are represented here, his percussion pieces, his prepared piano, even his tape music. Start here, then get Indeterminancy, Roaratorio, more preapared piano pieces, and Cartridge music. But DO start here, there are too many poor interpretations of Cage's music available, you can't go wrong with this. And if you already know Cage's music but don't own this, then you should be ashamed of yourself.