There have been a number of threads about fiddle playing which have included comments on intonation i.e. playing in tune. It amazes me - in some ways - how many players seem to have dodgy intonation. For example, to my ears, the intonation of Pete Cooper and Stacey Phillips on the cds that accompany their fiddle books sound a bit "strange" to me. On the other hand top classical players - and swing players - Stephane Grapelli, for example - always sound bang on.