Try looking at this thread, Click here and see if any of that helps. It also helps if you put the title of the song/tune you are looking for in the thread title......"violin" doesn't say too much. Sorry if we're not more help. Charlie just went "nutso" on this one.......Devil's Dream, Fire on the Mountain, etc.
If all else fails, just tell the fiddler to use double shuffles in A when in doubt.......(well, or whatever key your vocalists are in.....)