One of my favorite things to listen to are the CDs recorded by a band from Holland called The Beau Hunks. They named themselves after a Laurel and Hardy movie because their specialty is re-creating the great background music from the Hal Roach comedy shorts. It was primarily composed by a man named Leroy Shield and it's best known from the underscoring for the films of Stan Laurel and Oliver Hardy.
This article describes the extraordinary effort that went into reconstructing these tunes. Getting together an orchestra to play them was the easy part. The hard part was painstakingly re-creating the sheet music, which meant studying the films in minute detail. The output is utterly faithful to the originals except it's without the hisses and scratchiness and actors talking over it. Great stuff. If you'd like to try a CD, I'd recommend this one, which is mostly tunes from the Our Gang comedies but many of the same cues were used in the films of Stan and Ollie.
Here's two minutes of the Beau Hunks rehearsing for a live appearance…