Hello, this is my first post here and I wish to ask a question that might seem pretty simple to answer for some of you.

I am trying to score down an arrangement of Dave Brubeck`s : Blue Rondo a la Turk and I am having trouble. Let me illustrate my problem

Blue Rondo begins in 9/8 and then changes to 4/4. The big problem is that there`s a section of the song just before the switching of the 9/8 to the 4/4 section that defies my attempts to score down. By ear, it sounds like it switches from 9/8 to 12/8 before it goes into 4/4. But I am unsure of that. Can anyone enlighten me as to exactly what is going on?

Secondly, What is the tempo relationship between the 9/8 section and 4/4 section? I would think that the triplet of the 4/4 section would be of the same note value as that of the quaver in the 9/8 right? Again I am uncertain and would appreciate greatly if someone were to be able to help me with this.

The 9/8 feel going to 12/8 is simply a preparation for the 4/4...As U do realise that the 12/8`s grouping is also in quadruple, just like the 4/4...So such a transition will make the change smoother.