Looks like a happy dulcimer family.

Hi Strumelia, The tunings are geared to my singing voice.                                                      The Box Dulcimer is tuned D A D but with the Capo on the first fret                                          it is now in Aeolian Eminor.  This suits my singing range.

The Tear Drop is in F A  G (Dorian) for this allows me to sing a D on                                      the 11th fret.  I may not have answered your question, but that is the reason                       I have them tuned this way.

A lovely collection of dulcimers, John!

I am curious to ask one question though-  I see you apply a capo in order to play in aeolian mode... why then do you 'not' use a capo for playing in dorian mode (i'm assuming you are retuning to play dorian mode). If you retune to play in dorian, why then use a capo instead or retuning to play in aeolian?