In november 1974 Oscar Peterson was in concert at Prague Jazz Festival, and after some takes in solo and in duo with N-H. Ø. Pedersen, as the following exciting Mack the Knife,
he invited Count Basie, who had to play after with his orchestra, to joint him on stage.
They played, with a rhythm session (Pedersen, Freddie Green and Skeets Marsh), the following three tracks,
The Montreux Jazz Festival of 1977 was particularly dedicated to the "Art of the Jam Session" and quite all concerts were published in a LP set of 8 disks.
The following video made on July 14 shows a part of the Jam Session directed by Count Basie. The beginning set in trio with Ray Brown (bs) and Jimmie Smith (drm), named Trio Blues, is a particular event because, according to Norman Granz, was the first time that Basie as ever done a trio number in a concert.
In the second set, Kidney Stew, we can appreciate all the other members of the jam session:
Roy Eldridge (tr) Beny Carter (a. sax) Zoot Sims (t. sax) Vic Dickenson (tbn) Al Grey (tbn)