Violin Rib Tuning....
David Langsather, Violin Maker
3425 Fairhaven Avenue N.E.
Salem, Oregon 97301
(503) 364-8685
Web Site: www.violinresearch.com

E-Mail questions and comments to:
info@violinresearch.com
(revised 10/2020
Page V_29
...Just a few words might be useful here.
..The goal Tap Tone RIB frequency is (227 1/2) HZ horizontally, all over the exterior rib surfaces, and even from top to bottom at each point.
..This tap is applied to the ribs horizontally from the side (either inside or outside and 90 degrees to the surface. Compare to the wood reference tap tone scale tool (pink click box below:). The rib thickness at: (1) mm thick rib (0.0394") should be close to the goal frequency automatically.
..To deal with areas that are too low in horizontal Tap Tone; remove a small amount of material from the inner, inside edges of the glue liner strips on their inside direction edge as needed, on either top or bottom glue liner strips in order to raise the Tap Tone up to the desired 227 1/2 HZ.
(Be sure to leave the glue surface its full width for glue joint strength.)
..Cross Section drawing of the violin ribs and glue liner strips...
..To RAISE side tap tone to 227 1/2 HZ, remove material in a bevel shape from glue liner strip that is lowest until rib side tap is evenly (227 1/2) HZ, top to bottom.
..To LOWER rib side tap.. lightly sand this inside edge narrower, being sure to leave the glue liner glue area full width. That is, sand a shallow taper on this inside surface.
violin029006.jpg
..Instructional video by clicking here. Begin video at 00:12:45 for rib featured material... Please also listen for universal tap tuning tool signal, on same video.
violin029005.jpg
Ideal Tap Tone...
........(227 1/2) HZ
Click Here....
..Our goal is to have a side tap frequency of (227 1/2) HZ evenly on all the rib outside surfaces. {See tap tone reference tab below.}