Vigdorchik Top Plate

..Isaak Vigdorchik is the author of a book entitled: "The Acoustical Systems of Violins of Stradivarius and Other Cremona Makers", published in 1982 in hardback by About Face Press of Westbury, NY. It is 169 pages long. In his experience as a musician, violin maker, and violin researcher, he discovered some insightful acoustical features of violin family instruments.
..Of particular interest to us is his discovery that properly graduated violin plates (top and back) exhibit the above acoustical patterns of tuning. This feature (and his insight) allow us to quickly adjust the violin plates to even tap tones all over with minimal removal of material. I have discovered the ideal full sized violin plate frequency goals to be 176 HZ for the top plate and 198 HZ for the back plate. Now using Vigdorchik's technique of adjustment, this even 'ideal' tap tone frequency can be obtained all over each plate.
..Here is the procedure outlined: {Click on link box by subject}

First the violin to be adjusted must be fixtured, before the top plate is removed, inorder for it to be reglued in original alignment on re-assembly.
Secondly, the plate graduation should be adjusted to ideals (excess wood removed from too thick area) (or as close as possible if too much wood has been removed from some areas).
Thirdly, the plates should be adjusted to goal frequencies all over the vibrating surfaces using the vigdorchik method to first make the tap tone even all along the center of each tone strip; and secondly to adjust each tone strip to match the goal frequency for that plate. Until the tap tone is even all over at correct frequency.
Fourly, a new bass bar needs to be made (or adjusted to) and tuned to the same 176 HZ tap tone all along its length.
Finally, glue the top plate back in place using the alignment fixture.