For what it's worth: My personal take on the subject is that all different styles of music are different and require different touches. Jazz, folk, country etc. Although there is nothing like a good solid base of music theory you must learn the style of the music you are playing. In my area we play Down East style fiddle which will sound differently than say true scottish fiddeling or southern fiddeling, although playing the same tune, for example. I believe this results from learning without a good solid background of music and the instrument. Many times incorrect although workable theory. That being said, I have heard excellent musicians who could play both classical and folk or fiddle equally well. Hope you hear from Sorcha on this one. Cheers: Jim