..These are articles and Instructional videos about acoustically adjusting the RIBS and Blocks of the Violin:
..Please note the date (created on) before the article listing. Just click on article description to see the article or video listed..{newer is better...}
Date Written or Last Revised:
Description of the article or section...Just click on name below to go there...
...Just a few words might be useful here.
..The goal Tap Tone RIB frequency is (227 1/2) HZ horizontally (and vertically) , all over the exterior rib surfaces, and even from top to bottom at each point around the perimeter of the ribs. [This frequency is exactly half way between the top and back plate tap tone frequencies; 213 HZ and 242 HZ]
..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. Adjust the areas that are above (227 1/2) HZ by sanding or scraping the surface, or insides of the rib stock, in the region that is too high until it becomes the (227 1/2) Hz goal frequency. Leave the too low areas alone. Material can be removed from either inside or outside of the ribs to the same effect. A (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.)
