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Acoustical tuning of the Finger Board ...(continued)
Revised 3/2018
Page AT_02
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  This photo shows the strings being carefully removed.
  As each area is scraped/sanded the tap tone
is constantly checked against areas which are already at the determined 'goal' frequency.
  A wood scraper and sandpaper
of various grades on a foam sanding block are the tools I use to gradually bring the tap tones into alignment.
This photo shows the small total amount of wood sawdust and shavings removed to completely acoustically tune this violin's fingerboard {188 HZ all over top surface}{both top and side taps will match!}
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  Several grades of silicone carbide sandpaper (# 400 then # 600) bring the fingerboard back to a fine finish, ready to polish.
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  Next, a piece of pure linen cloth is wrapped around the foam pad and the fingerboard is briskly polished.
   This is followed by polishing with a pure silk cloth in similar manner.
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  Here we see the fingerboard, polished, tuned and ready for the violin to be re-strung and further tested. It should now produce even power on all the fingered notes.
( Copyright 2018 (c) by David Langsather)
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Tuning'...
..The side tap of the fingerboard, all along its length and on both sides is at 188 HZ.
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Ideal Side Tap Tone... ..188 HZ