Marty Kasprzyk

  • Content Count

  • Joined

  • Last visited


About Marty Kasprzyk

  • Rank
  • Birthday 06/02/1945

Profile Information

  • Gender
  • Location
    Olcott, NY, USA
  • Interests
    Wine making, gardening, dog training,

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. The plant leaf is way ahead of us violin makers. You might like the book "Plant Biomechanics, an engineering approach to plant form and function" by Karl Niklas
  2. I use "clear" Gorilla glue. It has a much longer setting time which gives ample time to make sure everything is correctly positioned. I also use it for gluing my bridges down. However I do use super glue for hardening the string bridge's notches.
  3. How about putting the thin superglue just on certain plate areas to stiffen it just there. Maybe you could kill wolf notes that way. I recall you mentioning putting dimples in metal plates to stiffen them in areas where the vibration was too high.
  4. I suspect maple is used for the back plate because it is a poorer sound producer than spruce so that more sound will come off the top plate than the back plate. MDF is not as good a sound producer as maple thus it should be an even better back plate material.
  5. Bending stiffness is proportional to E not E^1/2. I'm getting stiff in my old age and I should do more bending stretches.
  6. You could adjust the longitudinal and cross grain stiffnesses to duplicate various woods by cutting grooves in the MDF plate with your cnc machining (subtractive forming) or by gluing on ribs (additive forming) like they do in guitar building.
  7. How did it sound and play? I believe a high amount of damping isn't necessarily bad--it should reduce note starting and ending transients which would make fast passages less blurred and it should reduce wolf notes.
  8. I forgot to also predict the amplitudes of the signature modes will be higher.
  9. It will sound great. All of the signature modes will be lower in frequency and closer together which will give a rich lower end sound. The high end will probably be normal. The only problems are that it isn't traditional, looks too plain, it will soak up a lot of varnish and wood dealers will put a price on your head.
  10. I don't think cardboard is so bad and I've always thought it can be superior to solid wood. A corrugated cardboard can have a higher stiffness/density, strength/density, and higher speed of sound/density ratio than solid spruce because the empty channels mimic the longitudinal porosity that wood has on dense cellulose but with an even greater effect. However I don't think it is a good idea to use wet cardboard just as it isn't a good idea to use wet (or green) wood. Of course this doesn't mater for violas.
  11. There are many varieties of red and white wine grapes and there is some overlap in their wine flavor characteristics so it is not possible to identify with certainty in a blind test whether or not a wine is red or white. For example I colored a good chardonnay white wine that I had made with tasteless red grape color extract and I was able to "fool" two dozen experienced wine tastes in a blind red wine taste that it was a red wine. I didn't really fool them--it just tasted like some of the red wines that they've had in the past and they just thought it was another one. In this case
  12. What are the acoustic differences between flat top and arched topped guitars? What is the advantage of an arched top guitar?
  13. It's in good condition because nobody liked playing it.
  14. I've made the bad mistake of making easy to play & sweet sounding instruments and hoping good players would like them. This is similar to expecting mountain climbers to like Kansas.
  15. A good player once told me he played his Strad violin seven years before he began to like its sound. I asked him why he stuck with it so long and he said it was very difficult to play so it forced him to become a much better player. I replied: "If your goal is to become a better player you should use one of my violins."