By and large, when people turn up to see a guitarist. They have this idea in their heads of what a guitar sounds like.

Some people turn that proposition on its head - like Django with only two working fingers, Pat metheny with his sets of jazz sounds, Hendrix - of course. I supposethe strength of the syntheseis arrived at depends on having the charisma and commercial viability of the performance.

Davy Graham's proposition was that the whole shooting match was up for negotiation - tunings; time signature; ethnic origin of the piece; ethnic origin of the actual instrument and any other parameter you can think of.

This was in a period when some people in the folk revival were having hissy fits about Cockneys being allowed to sing The Rock Island Line.