[birdky] RPT/RFI--odd Eastern Towhee song?

Today at Cave Run Lake, I encountered an Eastern Towhee that was singing a song 
unlike any I had ever heard from this species before. At first I thought it was 
a White-eyed Vireo singing, but it didn't sound exactly right; I was very 
surprised when I found the singer and realized what it was. 

I checked all my field guides and reference books, and none of them seem to 
describe this call. All list the famous "drink-your-teeeeeee" call, and a few 
reference other calls that I've heard before, but non have anything close to 
what this bird was doing. 

I captured a video of 3 repetitions of this call and posted it on my MySpace 
page. The link below should open that video. 

http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=56635964

Has anyone else ever heard this song from an Eastern Towhee?

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