Unlikely, Bert, I'd have thought. The notes on an equally tempered guitar are playing against *what* non-equal temperament on the fiddle, exactly? Does this fiddler have good enough ears and fingers to play in different temperaments at will? I doubt it. Perhaps Texas Guest should ask her.

John Renbourn used to tell a story of when he toured with Stefan Grossman. They would tune up independently with electronic tuners and could not work out why their guitars then always sounded awful together. They then worked out that the tuners were out of tune with each other!