Dizzy Gillespie brings together tenor saxophonists Sonny Stitt and Sonny Rollins for four extended cuts, and in the process comes up with one of the most exciting "jam session" records in the jazz catalog. While the rhythm section of pianist Ray Bryant, bassist Tommy Bryant, and drummer Charlie Persip provides solid rhythmic support, Stitt and Rollins get down to business trading fours and reeling off solo fireworks. Apparently, Gillespie had stoked the competitive fires before the session with phone calls and some gossip, the fallout of which becomes palpable as the album progresses.
Rudolf Moralt (26 February 1902 – 16 December 1958) was a German conductor, particularly associated with Mozart and the German repertory. Born in Munich, he studied there with Walter Courvoisier and August Schmid-Lindner, and was engaged as a répétiteur at the Munich State Opera under Bruno Walter and Hans Knappertsbusch from 1919 until 1923. He was conductor at the opera house of Kaiserslautern (1923–28) and musical director of the opera house in Brno (1932–34). He also worked in Braunschweig and Graz before being appointed chief conductor at the Vienna State Opera in 1940 until his death. In 1942 he made a series of renowned recordings conducting the orchestra of the State Opera with the Austrian soprano Maria Reining.