[richiebee]

I always find that a SDC works better than a LDC on violin. I've never had a satisfactory sound for recording from a pick up - the violin resonates... you don't get that from a pickup. I usually place the stand behind the player with the mic over their head, a couple of feet up, and pointing at the f hole. If this is fiddle playing rather than sweet violin playing, I'd mic closer for a more direct sound. Point towards the strings/bowing area for a harsher sound, or away for a rounder sound.

Things to watch for...

Violinists tend to move around a lot. This can cause havoc for a consistent signal.
Violinists tend to sniff a lot. Make sure they don't, or if they can't stop, that you can minimize the sound of it by mic placement.
If they're wearing headphones, make sure you're not picking up excessive signal. Violins are fairly quiet instruments. The player will almost certainly only want one ear on with the cans so they can hear direct from the strings. Not a problem as long as the other ear on your cans are closed off.
Violinists tend to pluck their strings quietly to pitch notes. This is a nightmare! Just be aware.

R.