I have heard the beginning of this song many times on tv. They palyed it just now on the academy awards.
It was the first clip they played after Woody Allen talked about a foot fetishesest or something (I wasn’t paying attention). I think the main instrument is clarinet, and that it comes from a play, but I’m not sure.
I’m going to take a stab at it and assume that you’re talking about George Gershwin’s Rhapsody in Blue that’s played over the beginning of Allen’s movie Manhattanhere’s a link
The clip referenced by Hodge might not be recognized by mblackwell but it is the same piece. mblackwell, if what you remember is the piece starting with a clarinet playing a long note that takes a long slide up, that’s the very same. TV’s children may also remember that United Airlines used this piece in its advertising, although I don’t think they starting from the very beginning with the clarinet gliss.