Jim Dawson, I believe, is talking about improvisation which is a whole different colour of horse, and not a subject which immediately comes to mind in a discussion of Scottish music. I remember in my green youth getting very excited about my first exposure to pibroch; I asked my older friend how much improvisation was involved. I was surprised when he said "None at all!" I had thought that the piper was supplied with the ground, and each subsequent variation was his own interpretation. Course I was listening to a lot of Bird and Miles at the time. (How's that for show boating, Jim?).
Which is too bad, because improvisation is a cool thing. All of those blues solos are built around improvisation on altered pentatonic scales..
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