Killer Tracks, the production music library that is the source for “Frolic,” the quirky theme to the HBO comedy series “Curb Your Enthusiasm,” will continue its relationship with Larry David, through its music licensing executive James Frangipane. The piece was written by Italian composer Luciano Michelini.

Originally written for the Italian film La Bellissima Estate, David happened to hear the track in a bank commercial a few years before the show debuted, according to editor and music supervisor Steve Rasch. “Larry liked it and had his producer, Laura Streicher, track it down. … It became the sound of the show.  It’s like something you’d hear from the pit orchestra at a circus with tubas, mandolins and clarinets.”

The soundtrack for the movie was owned by RCA Italy, which, in turn, sold the catalog to Killer Tracks. Additional incidental music was found deep within a 70-CD collection of Italian cinema music from the former RCA catalog. Adds Rasch: “It’s work by Italian composers from the ‘60s and ‘70s and it all has that circus sound. It’s upbeat and goofy,” he explains. “It’s all analog, and some of it is mono, but it’s well-recorded and has the right sound.”

Killer Tracks specializes in pre-cleared music for film, television, advertising and interactive media. “Curb,” which will premiere its ninth season on Oct. 1, “represents some pretty intense scenarios,” says Rasch. “There’s a lot of arguing and a lot of stress. The music functions like a laugh track. It’s a cue for the audience to view what’s happening through a comedian’s eyes. It’s a funny look at heavy topics. The music lightens the mood.”