Scale length
General mountain dulcimer or music discussions
Yeah, to actually measure the difference, we would need to hold all the other variables constant. We would need the same builder to make identical instruments with the exception of the VSL. Same box, same bracing, same wood types, same wood thickness, same amount of glue, etc. And even then we would have to decide what string gauges to use. Would you choose the gauges most appropriate for the longer VSL or the shorter? Would you cut the difference in half to measure? Either way, you are not really hearing the way at least one of the dulcimers would normally sound.
Hypothetically, one could make two identical boxes with different VSLs and choose two string gauges which would produce an equal amount of tension at the two lengths. for example, if both were tuned to D4, you could have a 22" VSL with a 0.010 string and a 31" VSL with a 0.007 and both would have about ~10.5 lb of tension.
Of course youd never be able to perfectly account for the difference in the actual fingerboards. I guess one possibility would be to have both fingerboards be 31" long, and the "shorter" scale just doesn't reach the end of its fingerboard.
It really is too many questions rolled up into one.
updated by @nate: 03/11/25 01:50:24PM