I was listening to an NPR story a while back where they were talking about composing for Jazz orchestra. The composer commented that one problem with concert trained musicians is that they "don't swing, or don't know how to 'swing'". That brought to mind a concert band concert at Eastern Michigan I once saw. The band tried a "jazzy" piece and failed miserably. They didn't "swing".

Now, given that the string players on Motown recordings in the classic era were from the Detroit Symphony Orchestra, was there any problem getting the players to "loosen up", and if so, how long did it take to get them to do so.