It’s not Caribou.
No other guesses?
Sigh.
Got it.
Look here. With video no less! Takes a while to download, so be patient.
AugustWest. You’re killing me, dude. >Shakin’ my head.<
I’ve been having trouble identifying a song that has only been guessed as something by Echo-Whiskey–er, EW&F. Here’s a clip of the beginning portion; does this sound like the song, per chance?
Oh, and please don’t mind the jingle, etc. I clipped it from an old jingle demo. 
Or could it be Serpentine Fire? I had a hard time making out anything discernable, and it sounded scatological.
Joe K. That’s “Serpentine Fire” by Earth Wind and Fire. Gonna tell a story, morning glory? I bet if I saw your face in the morning sun, it’d spark me to shine.
Agsin, not the song I’m looking for but I’m glad I could help you.
Wait—I’m confused now—The link I posted isn’t the song you’re looking for, but is the song I’m looking for?
A wild shot:
Could it be Sergio Mendes & Brasil 66?
Song: Mas Que Nada?
Can it be that it sounded without lyrics because it was a song in Portuguese?
A new cover by Tamba Triocan be found here:
http://www.mp3.com/tracks/2912059/dl_streams.html
Ignore the “not found” message, scroll down and click the “play song clip” button.
Joe K. It appears so.
I think a lot of people might be confused because they think I’m transcribing musical notes as “Ba y yi. Ba yi ya.” No. they are vocalizing with their voices. EW&F are singing those sounds in harmony.
In fact when the song starts off its a capella and the music kicks in after the first verse. It’s really sweet and mellow and spiritual but short and hard to find and I’m sad because I have to GO TO BED without knowing what this song is and people like** AugestWest ** and **Happy Scrappy Hero Pup ** are toying with my emotions… sob! OH PLEASE, WON’T SOMEBODY THINK OF THE LITTLE BOY INSIDE ME? sniffle
GIGObuster: You know, I don’t think it’s Serio Mendes but you might be on to something that it’s in Portuguese or some language I don’t recognize.
Askia:
Try this page, lots of clips
I think it’s the one called “Brazilian Rhyme (Interlude)”, from the “All N All” CD – first one.
Monstre, that’s it!
Oh, thankyouthankyouthankyouthankyouthankyouthankyouthankyou.
Phew. Glad that’s over.
And solved by a pasty-ass white-boy Monstre, no less… 
(who’d never heard of this song until now ;))
You’re pretty fly for a white guy. >grin< Make that any guy.
I was able to convert the .asx file you linked to an Mp3 so I finally have this song on my Mp3 player. Thanks again.
It’s EW&F Brazillian Rhyme Live from their Live in Rio Album. That has been killing me for weeks!
Is it Rio by Duran Duran?
Happy_Scrappy_Hero_Pup beat you to the joke by 20 years.