I had some difficulty finding anything informative on this.
NOt because it was not there, but because source after source just mentioned it, ie that jazz was the result of African and Classical European music, and then moved on to whatever point they were trying to make, ie that Creole music played a part, or that Cuban music played a part.
You are asking for a piece of information that is generally assumed to be a given.
BUT, I did find this for a start.
how did classical music influence jazz music Yahoo Answers
"Best Answer:Jake is correct: jazz harmonies first appeared in the work of romantic and impressionistic composers. And those composers built all of their music (as does jazz) on the twelve-key system invented by famous Baroque composer J.S. Bach."
And.
"Though I am no specialist I find the question interesting.
I would start by watching the tools, the musical instruments that are currently used in both classic and jazz music. The most obvious I can think of is the piano. Two features in playing the piano : rhythm is given by the left hand and melody by the right hand. This holds true in both classical and jazz music.
What about musical formation , You can find quartets and quintets in both classic and jazz music. There must be a lead instrument : for example flute in classic and saxophone in jazz. There has to be bass too, which holds true in bithe musical genres.
There are orchestras, to play classical symphonies and standards in jazz. "
I assume you will dismiss this for some reason. I will keep looking.