James Cotton is undoubtedly one of my favourite harmonica players. His techniques are amazing, making he's one of several legendary players in the blues harmonica world. One of his techniques that he often employs in his songs is warbling. His warbling technique is so unique. Here you can hear some of his songs. Check out "How Long Can a Fool Go Wrong", as you can notice that he plays in first position, a position rarely used when playing blues harmonica.