we use the ..mixolydian tuning. for the "g "tuning...g,a,a,a. for the "d"tuning....d,a,a,a. of course on a four string dulcimer. the "d" tunings seem to b the best range for instrumentals. the"g "tuning works best for us in our vocals numbers,using the dulcimer much like the autoharp,for bach-up. listen to our songs on mudcat radio and hear how we use this wonderful,versatile instrument!!!!