CotD: Fleischer Studios became Famous Studios in the early 1940’s, and Seymour Kneitel directed “Hep Cat Symphony” in the continuing NovelToons series.
Hep Cat Symphony (1949) — Noveltoons Theatrical Cartoon Series
The hep cat in Tin Can Alley finds the mouse symphony orchestra practicing next door a constant disturbance to his jazzy jive. Dressed as the Pied Piper, he pipes them away, but the mice call the final tune.
Come see “Hep Cat Symphony” on video at Big Cartoon DataBase