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Using Acoustics (wood frequencies) to make the final adjustments when building a violin family stringed instrument, for better sound!
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...When the maker is shaping the bass bar on the inside of the top plate, how can he be sure is it too neither too thick or too thin?
...When shaping the plates of the violin, how do I know when I have reduced the plate thickness just the optimum amount?
...For that elusive pleasing tone, just what frequency should the plates be anyway?
...How do I fine tune (shape) the fingerboard so that all the notes are even?
...When I am shaving down tuning pegs, how small should I make them?
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...These are just a few of the questions an instrument maker must ask himself at many stages in the development of a violin family instrument. The maker who does not know the technique of the final shaping of the various wood components using acoustics (tap tones), must rely instead on careful copying of a successful famous violin. While this approach will produce a successful instrument if all the wood components are identical to the original wood used in making the famous instrument being copied; the wonderful sound we all long to produce is dependent on numerous precise tonal relationships and even 'close' will not truly satisfy. The tone variation in seemingly identical pieces of wood can be as much as a full octave, so some scientific method must be used to finally shape each individual piece of the violin so that it matches the sound requirement for that particular part.
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...Based on my experience and research (so far), I offer this list which I feel are important for producing an excellent tone (and power); all of these must be in a specific acoustical (tone or frequency) relationship with certain other parts of the instrument. Click on the topic below to be directed for detailed information:
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back plate must be an even overall tone and 3/4 of a whole tone higher than the top plate.
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plates must produce specific ideal frequencies when fully mature (after the effects of U.V. light on the surface), in order to be pleasing to the ear.
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Each plate should produce stepped Vigdorchik over-tones, (which they will if the tap tone is even all over).
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The "ff" holes (sound holes) must produce a tone in a narrow range and be identical.
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The liner strips should be tuned to the mature frequency of the plate adjacent to them.
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The completed fingerboard should have an even tap-tone all along , under each string, from nut to the end nearest the bridge.
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The violin neck should be shaped to produce the same matching side tap-tone as the fingerboard at the glue joint with the fingerboard..
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The tap tone of the back of the scroll and down on the end of the fingerboard should match.
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The tap relationship of the nut and the end pin should match to produce a 'clean' sound.
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The bridge should be shaped so that the upper area matches the top plate frequency and the lower area matches the back plate frequency..
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The tail gut is adjusted so that the tone of the back side of 'D' string is 1760 Hz.
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The sound post is sized to produce the same tone as the back plate and sound post pad of the top plate..
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The sound post pad on the top plate is left thicker to match the frequency of the back plate.
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The tone raising effect of sunlight must be taken into planning plate frequencies.
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The tone raising effect of certain varnish 'grounds' must be accounted for.
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The tuning pegs may be shaped so as to produce the tone of the string it is used for.
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All tuning frequencies used should be in harmony with carbon at 37 degrees celsius (body temperature).
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The wood used in plate making must be oriented to transmit sound best.
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The wood selected should be well cured and have excellent acoustical properties.
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The Nut frequency must match the fingerboard to balance open and fingered note power.
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The Sound Post ideal position must be determined...
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The completed weight of the violin (full sized) should not be more than 400 grams ready to play (not counting the chin rest).
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