(updated: 4/2016)
(Page: TTP-2)
Tap Tone Project...Conclusions (4/2016)
...My 'tap tone project' is the out growth of my interest in violin making and development. It began as a simple observation that my inserting a small steel pin in the endpin of my violin made a drastic change in the violin tone (for the worse)! It made me realize how sensitve this instrument is to small changes sometimes. Study of the end pin lead to another area, then another, and to eventually the entire instrument, as at this time.
...A Tap Tone is simply the sound you hear when you gentely tap a part of the violin. It could be higher or lower than what it is now. The question is this; is this important to the function of the violn, and if it is important, what is the correct tap tone for this part of this instrument?
...When listening to tap tones, we want to pay attention to the lowest part of the sound. Imagine you are listening to a musical group play a tune; the tap tone we are interested in would be equivalent to the bass line (we need to train our mind to dis-regard the higher pitched instruments (the over-tones).
...For out part, we will both measure and adjust by comparing two Tap Tones, one after the other. All we really need to do is listen with a quiet mind (do not allow your self to 'mind talk') and just get an impression if the second gentle tap tone is highter or lower than the first. Once we have a wood tap tone reference source most of the work (except al lot of practice of course) is done.
...What I believe I have discovered is that for the full sized violin , there is actually one ideal top plate frequency that is best, and one related ideal back plate frequency. These have now been discovered by a great deal of research, testing, and listening to professional recordings over the past 10 years of daily effort.
...The parts of the violin I have concentrated on as especially significant are: The nut, fingerboard, string bar of the tailpiece, saddle, end pin, bass bar, (ff) sound holes, underside of the neck, side surfaces of the scroll;
...all of which should match the 'center of the top plate' tap tone frequency. (176 HZ).
...The bridge, tailpiece proper,tuning pegs, tail gut, outside surfaces of the scroll, and the sound post, the side tap of the neck at the nut, and the side tap of the ribs, should match the 'center of the back plate' tap tone ( 198 HZ).

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...Unless I am mistaken, I believe that eventually the finest concert instruments in the world will eventually be analyzed to verify this research data. If I am wrong, we will report that to you and make corrections as necessary. I would suggest that the reason these instruments have been selected is that they closely produce these acoustical standards, and thus perform to the highest level.
...(If you are Hilary Hahn, Joshua Bell, Itsak Pearlman, or Nadia Sonenburg, please consider helping...one hour of your valuable time will yield some valuable acoustical secrets of your instruments, or at least confirmation of my research, to the good of violin making comunity worldwide.)
(C) David Langsather at Salem, Oregon USA (4/ 2016)