Glee Production/Background Music

I’ve been searching a while for the production music used on "Glee". It includes pretty much anything that isn’t a cover featured on an episode.

So far I’ve found only a few tracks from the first season. I’ve found a lot of the tracks made by The Swingle Singers, an all-acpella group who covered famous compositions, such as "Moonlight Sonata", "Flight of the Bumblebee", and "Soul Bossa Nova". The other track is the piano composition by Kerry Muzzey titled, "Looking Back", which was the "sad" theme played throughout the first season.

Regarding anything other than this, I’ve been at a loss. I have come to discover that a man named James S. Levine is responsible for most of the tracks, working alongside Extreme Music. I am aware that trailer music is not allowed, but I would think this counts as a television score.

Any help would be much appreciated.