アメリカ合衆国のロックバンド、シカゴの作品。In 1969 Chicago appeared at the same rock and roll revival in Toronto that produced ジョン・レノン's "平和の祈りをこめて". Since 1978 there have been innumerable unauthorized LP and CD releases of the same poor-quality recording of this performance. There were eight songs recorded at the gig, seven from "シカゴの軌跡" plus the then unreleased "長い夜." Almost all of these releases include only seven of the songs; "ビギニングス" is nearly always omitted, its title often being wrongly given to the track "Introduction." (All of these releases give at least a couple of incorrect song titles, such as "Purple Song" or "Questions 57 and 58.") "Liberation," the one song in the set not to appear on any official live album, is frequently edited or faded early. (On some versions, "all" the songs are faded early.)

出典:wikipedia