Was my post in march not helpful?
Thanks! It did give me one or two ideas. But I have come across some vague
mentions of some quite odd tunings and drone combinations.
However never a full rundown.
Don't for get my instrument has 8 strings, of which the first 2 are melody
strings. Although I built the instrument and play by ear I am not a trained
musician. Actualy I am a retired Electronics engineer and amateur
astronomer with a strong interest in my Scandinavian and Irish ancestry.
Wikipedia has a list of langeleik players and builders. There are
several U.S. communities of players listed at http://en.wikipedia.org/wiki/List_of_spelemannslag
as well as Scandanavian communities.
I got this information by googling "langeleik" You'll find a lot more
Bear Meadow Appalachian Dulcimers
I've only read a little about music history or theory. I seem to
recall that even the entire scale may have been shifted quite a bit in
the past from A=440, some antique instruments seeming to be much
flatter, some sharper. And that's just 'western' music scales.
You may either be on your own in which case music theory may offer
some help, or perhaps find some music-oriented Scandinavian historian