Chicago at Carnegie Hall is the first live album, and fourth album overall, by American band Chicago. It was initially released on October 25, 1971 by Columbia Records as a four-LP vinyl box set, and was also available for a time as two separate two-record sets. A Quadraphonic mix of the album was proposed, but was never performed, possibly due to the band's objection to the album being released in the first place. This is the only Chicago album of the group's first ten releases not to have a Quadraphonic release in any format. The album reached No. 3 on the Billboard 200. It was certified gold by the Recording Industry Association of America (RIAA) two weeks after its release, and was certified platinum in 1986. While touring in support of Chicago III, Chicago played Carnegie Hall for a week in April 1971 and recorded all of their shows. A four-LP box set collection for release as Chicago's fourth album (that distinction being responsible for the album's nickname of Chicago IV) was the result. Walter Parazaider told writer William James Ruhlmann that "The reason behind the live record for Carnegie Hall is, we were the first rock 'n' roll group to sell out a week at Carnegie Hall, and that was worth rolling up the trucks for, putting the mikes up there, and really chronicling what happened in 1971." Columbia were very skeptical on the risk the extended set posed, and with a decrease in royalties to counter that fear (a similar situation befell their 1969 debut Chicago Tran