Keats doth not need music…
Well you see Keats reached the land of poesy that is beyond understanding of music (Just as some composers reached the land of music that is beyond understanding of poesy). If you mix poesy with music, there will be always something lost on both sides (a song is something different, it uses feeling of music instead of feeling and beauty of poesy).
I am sad I have heard the reading of Ode to Nightingale, for the Bright Star film, for now when I read this poem, I have associations with Mozart’s serenade (Which was poorly sung, if you hear the orchestra playing it, you will see, it is much, much better. But actually I didn’t like the whole film, it was too monophonic, characters one dimensional and mostly wrong, like Brown (Who was more of an evil queen (Or Amadeus Salieri), who was jealous of Keats, where in real life we thank him for many surviving works of Keats, which he saved from trash can and actually dedicated his whole life to Keats) or even Keats himself (Who was a beautiful prince, who didn’t really gave a damn about poetry or his artist friends). The film was more like this 7:07
http://www.youtube.com/watch?v=slMpJvt6b0I .But that is maybe because I don’t really watch movies, and the only things I compare this film is to masterpieces of literature and the greatness of Keats himself, which is extremely difficult to put into a movie save Documentaries or a know better about the life of author bbc bio pic, which just shows you where he was and what he did (like Byron 2003). I mean the work was too hard and big to handle for anyone, plus you have to make this movie for the ones who don’t read poetry at all, also, which is drastically hard without ruining everything. I think the only person who could have introduced Keats perfectly was… Keats himself)
Anyway, I think Poesy and Music must stand side a side but not cross each other, especially if the music or poetry was not made for a concrete piece of another (Which is making great walls for Poet or Composer). But there are pieces done that way (making one for another and not just crossing two already great things) like Ode to Joy. Music and Poem are close to each other, and the line that goes between them crossing as a song makes little damage to both (especially if you note the fact that there is only part of poem used) but still they are lowered, like two mountains that were bent to each other. They seem bigger, but the height is not as great.
You can associate music with bard like poets such as Byron, but Keats is a True poet, who needs no music, he has his own.
It is like translation: weak parts are made stronger, but great parts and senses are dumbed, and you read a poem that of numb beauty.
By the way sorry for elaborate sentences.