What's a crwth? Well, I'm sure there was a thread about this a while back, but here's a wee taste of me playing it, albeit improvising wildly with little regard for anything so much as resembling conventional musicality in the autumnal woodland:

Sedayne : Crwth Improvisation

Five strings / Welsh-ish; mine was made for me by Tim Hobrough back in 1987 before most of the current purist crwth-fadders had even been born. This doesn't made it right of course, just that back in those days we knew no better!