Letterman plays song when card flies threw window?!

Question:

Letterman plays song when card flies threw window?

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On the Late Show with David Letterman there is a song they play as a joke whenever he throws a cue card threw the "window" Background set.

I think It is a John Denver song. The Lyrics include "flyin, flyin high"

Additional Details

14 hours ago
I'm aware that is changes/running gag. I've been loving this show since I was 10! I've always loved Dave's type of humor: Will if float? Do you know your cuts of meat? Mujibar and Sarajul, etc.

14 hours ago
Oh yeah. Old Turkey Buzzard by Jose Feliciano is the correct answer. I have to wait 4 hours though :(

Answers: 14 hours ago
I'm aware that is changes/running gag. I've been loving this show since I was 10! I've always loved Dave's type of humor: Will if float? Do you know your cuts of meat? Mujibar and Sarajul, etc.14 hours ago
Oh yeah. Old Turkey Buzzard by Jose Feliciano is the correct answer. I have to wait 4 hours though :( “Old Turkey Buzzard,” by Jose Feliciano It changes. It's been the sound of glass breaking, a voice saying "Hi, rocking chair lady," the song "Kung Fu Fighting" and other effects.

It's a running gag.

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