What fiddle tunings do you use?
Other than the regular violin tuning of G D A E, I also use G D G D. I have two fiddles, and most of the time the fiddle I use for open tunings lives in that tuning. I also use a low D "drone" string on the bottom, then D A D. I'll also take that same tuning and tune the whole instrument down to C (drone) G C F#. That's because some of the songs I sing need to be a key lower for my vocal range of the song. I also use a couple of variations on the tunings I've mentioned. On the CD "Darcie Plays the Fiddle and Sings," whenever I use an alternate tuning, I list it. It's on the artwork.
Over the years, that fiddle has become very deep and loud. That's because the tunings make the fiddle vibrate at a lower frequency. It really opens up the wood.