Scale length
General mountain dulcimer or music discussions
Wow there are some pretty skilled musicians showcasing those instruments
I think that any effort to directly compare different VSLs would be a compromise of all kinds of other features that probably affect tone far more than VSL. While the original question specifically asked about scale length, there is also the broader question of how tone, volume, and sustain are affected by a physically larger instrument. I think in general dulcimers with long VSLs tend to often have larger soundboards, are often taller, are often sturdier and can handle more tension, and are often tuned lower. The many other factors that come along with a long VSL can affect the tone more than the VSL itself.
