This makes sense, I guess, 'cause the different materials are of varying hardness, and will be partial to different frequencies... Harder the Higher, Softer the Mellower, and so on. However, I think this is way over my head, and I've never considered it before... My problem is chiefly this... the pegs vibrate at the frequency of the little stretch of string between the saddle and the pins. this length does not vary very much, mostly a value of string 'TENSION' change. As with a H-Dulcimer, the string on the other side of the bridge, vibrates at it's own frequency, though it was not struck. See what I mean? I just don't understand how it matters...ttr