The audio recordings of the festival eventually became the basis for many albums, most notably the 1970 release "Historic Performances Recorded at the Monterey International Pop Festival" featuring partial sets by Otis Redding and Jimi Hendrix. Other releases recorded at the festival included dedicated live albums by in 1967 and Jefferson Airplane in 1991. In 1992, a four-CD box set was released featuring performances by most of the artists; various other compilations have been released over the years. According to a radio promotional feature that accompanied the box-set release, on modified stages, including flatbed Kaleidscope (LA) trucks, set up in the surrounding environs, there had been several spontaneous jam sessions for the overflow crowds and campers. Among them was one at the Monterey Peninsula Community College sports stadium (right across the Hwy. 1 interchange), where Jimi Hendrix, flanked by Jorma Kaukonen and John Cipollina, played for an enthusiastic audience. It was also reported locally that Eric Burdon had checked out the provisions and healthcare facilities.