Violin Scroll acoustical tuning (adjustment)...
( Updated: 3/2021)
(page V-76)
..By tap tone of the Scroll, I mean a tap in this direction and all along the shape following the curves (evenly on both sides). This is measured and adjusted as one of the last items before varnishing the violin and after the neck (under the fingerboard) tap tone is adjusted to (227 1/2) HZ (same as the ribs).
...We want to adjust these tap tones to: (227 1/2) Hz using the new wood reference tap tone scale. (See useful tools in Tap Tone Technology section).
To lower the tap tone of the scroll, alternatively the throat could be made deeper. Do this in tiny steps and measure so you do not overdue!
...I imagine that getting this part of the neck structure to work properly with the rest of the neck and instrument, will make a notable imporvement in the playing characteristics of your instrument.
(c) 2021 by David Langsather
File the flutes deeper here on the bottom side of the scroll as well as on the top (opposite side) of the scroll; to lower the tap tone of the scroll.
..To raise the tap tone of a point on the scroll; narrow the side there to raise the tap tone. continue around the scroll shapes throughout the scroll.
..If the tap tone is too high from the outside down, sand or scrape that outside surface slightly to lower tap tone to (227 1/2) HZ.
..Tap tone taps in the center and on both sides, should all match the (227 1/2) HZ goal. The center tap will average the two outer taps. Adjust the side that is farthest off goal first, and then the other side until they match at (227 1/2) HZ.
...Carry this tuning all around the scroll shapes.
CLICK HERE to hear: Ideal Tap Tone..(227 1/2) HZ
..As a check, the end tap ot the eye and side tap all around the scroll, should also be (227 1/2) Hz Tap Tone. ..Adjust to make this even all around...
Ideal side Tap Tone...
........(227 1/2) HZ