levers on a dulcimer?
General mountain dulcimer or music discussions
Ivan, tune a string to a note. Any note. Now tune it a 1/2 note higher. That is all a lever does.
It might be that in the picture I posted the VSL appears to change. But on one harp I looked at this morning the levers were situated in between the bridge and the pin, so only the tension of the string is changed, not its vibrating length. In the other example I saw, the lever was itself a bridge. Each string went over a small horizontal pin, and it stopped vibrating there. The lever pushed a small piece of metal onto the string just after that pin, increasing the tension of the string. But the pin itself did not move, so the VSL did not change.
Ken is correct that the levers work essentially in the same way as fine tuners. Violin players do not have to change where they finger a note because they used the fine tuners. The tuners--like the levers--are situated on part of the string that does not vibrate.
There may be different models of levers that work in different ways. Maybe some really do change the VSL, and maybe that change in VSL would be enough to throw the fret pattern out of whack. I don't know. But there are at least a couple of examples of levers that don't alter the VSL at all.


) Paul arranged the piece for two dulcimers and not surprisingly he knows it better than Ron does. The arrangement is so precise that if Ron were to play a note that might sound great when playing solo but is not exactly what Paul had written, he would ruin the harmonies and counter-melodies that Paul intended.