From a performance probably in the 70s. The song as I know it from the studio recording kicks in at 3:57.
Speculating sometimes on personnel but . . . Lester Bowie (trumpet), Malachi Favors Maghostut (bass), Joseph Jarman (saxophone), Roscoe Mitchell (saxophone), Don Moye (drums), pretty much everyone (percussion instruments).
What Do You Do for an Encore? 