Marching Band Song

You know how that marching band on "The Electric Company" would be out on a football field, playing what sounded like a collegiate fight song while coalescing into a specific letter-of-the-day?

What was that song? And from where would I get an MP3 copy?

Thanks in advance,
TPE
(who doesn't know enough about college sports to recognize the tune, if that's what it truly is)