As history would have it, and thanks to the persistence of promoter Ron Delsener, Frank Zappa & his Mothers actually played Carnegie Hall. The two shows on October 11th, 1971 were recorded for posterity to mono 1/4' tape using a concealed Nagra tape machine and a Electrovoice 664 microphone. Both shows are presented here in their entirety along with the opening set of show 1 by the fabulous accapella group The Persuasions.