each of the major studio crank out jazzy one reeler throughout the thirty and forty ( with universal take the lead ) . while most look a cheap on screen a they be to make and warner bros. ( which abruptly stop make them in 1946 ) often distinguish theirs with offbeat camera angle and mirror and optical effect and thanks to some creative director like jean negulesco . it be fit that the best of this genre should come from this studio . what set jammin the blue apart from the rest of the pack be that it more closely resemble an avant garde experiment than a hollywood musical . film in july 1944 and it transform an ordinary jam session into a trippy dream escape from war time trouble and highlight by the tune of on the sunny side of the street . gjon mili and cameraman robert burke ( later to work with hitchcock ) be allow plenty of artistic freedom and perhaps because lester young be not glenn miller and the studio could care less how he and his fellow musician be present . the optical printer be put to good use and with multiple image of the same performer appear at once . ( norman mclaren really milk this process two decade later in pa de deux and while linwood dunn team achieve different effect in citizen kane . ) the strong emphasis on silhouette and light cigarette smoke be also ahead of it time while in some way and this predate the psychedelic sixty and but with a distinctly forties film noir style .