"Pete Kelly's Blues" was originally a radio series created by Richard L. Breen and starring Jack Webb. It ran on NBC as a summer replacement series from July 4 to September 19, 1951. Pete Kelly's Blues later became a short-lived TV show, produced by Jack Webb.
Jack Webb actually knew how to play the cornet. He loved jazz music and, as a boy, was given a cornet by a musician who lived near his home. While he never truly mastered the instrument he knew it well enough that his handling and fingering of the cornet in this movie is accurate.
In August 1957, this film was being widely shown on a double bill with The Last Hunt.