Normally I do not reply to anonymous postings of aggressive undertone, but "GUEST 15 Mar 17 - 10:57 AM" does have a point: an excellent musician in one type of music will not be successful in another style without thorough understanding, additional study, training, and practice.

My remark was aimed at those self-taught folk musicians who believe they can do without those technical achievements that are indispensable for classical training – and should also be considered so for folk musicians; the kind of "tricks" mentioned by Will Fly, who is certainly far from being a Classical snob. The books will tell you many more.

For example: learn to use all four fingers of your left hand right from the beginning, although many tunes can be played with only three.