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Dr. Ludwig

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    Western North Carolina
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    wood, biking, mountains

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  1. I resemble that remark, although not all PhD programs are created equal. But they still made me try to teach. But it is also the case that you need to know what you don't know. You need to maintain an inquisitive mind as another pre-requisite for most quality advanced academic degrees and for 'advanced artistic advancement' such as luthiers. I've meet all kinds in both fields as I am sure we all have.
  2. A more detailed paper by the authors. https://arxiv.org/pdf/2102.04254.pdf So I could be more enlightened after digesting this paper fully.
  3. There are a lot of PhDs out there teaching....often not lean and clean. They often bring a lot of baggage to the table. This might also apply to other types of masters as well. Your experience may vary.
  4. So, for me, AI needs to be defined here...just neural nets? To the article....there are many simplifications. Remember, all models are wrong but some are useful. It appears the inputs to the NN are just some of the geometry. Perhaps they need to increase that a lot, perhaps by starting with wood perimeters and wood treatments/varnish etc. Small changes can make big differences and NNs are famous for not providing the way. Using statistical methods to analyze large amts of data could give some objective categorization of violins. The categories would be ?? Peoples 'response'?? - way to subjective. Some frequency response curves?? But data might allow you to build a NN on an objective basis. But what does it provide in terms of understanding? What are you trying to understand? The research mentioned is not about identifying good tone. I think ya'all know the parameters of good violins better than anyone. Maybe, someday, further statistical analysis of 'good' violins would provide more knowledge about good violins. Maybe. Also, applying a biological model might provide A Model but probably not one that understands violins. This could be used to construct a NN. But to what end? Sampling the audience would only get their bias....pick what ever audience you want. A thing that happened in Natural Language Understanding that created a big breakthrough were statistical models created by some physicists that basically relied on frequency of words, combination of words etc. to create disambiguation. No grammar, no stemming, no understanding. Perhaps I over simplify. So I think you could create a model, by any means, and it would tell you that a violin that resembles that model would be well appreciated by a segment of an audience(database). How you actually create the pieces ( the actual understanding) would still be lacking.
  5. Very nice sentiment. Yes, so many violins for me to learn repairs on. Typically, the less you pay the more ( and harder) the learning. Maybe I should bet ,,,err, ah ....spend more.
  6. I guess you are saying make one 'noticeable' change (string angle) and then leave any other changes (VSL) as 'negligible'. That's OK. Looks like Dave Burgess has a nice angle changing rig, but of course that rig changes things from a standard setup too.
  7. If the nut goes down (rotates back?) does that change the vibrating string length? do you move the bridge to adjust....which changes the after length? Seems so hard to change 'one thing'.
  8. Dr. Ludwig


    You might have some interest in reading "Art and Method of the Violin Maker" by Henry Strobel. A short (70 page) general discussion on violins, their construction and design. Some references included, etc etc. Not an encyclopedia, instructional or comprehensive.
  9. Trackers would invite damage. Chips would only be useful for identification. So first they'd have to find the violin, recover it and then you'd need to show up with Gov. ID to prove just exactly who you are. Surely a cellphone isn't enough.
  10. Where would you put it? It would have to be hidden, at the least, to be of any value. Otherwise, it can always be removed. Seems impractical and I think photo ID might be enough.
  11. I'm just learning but from these pics I would suspect the rough scroll, purfling and f-holes. Maybe the construction technique. In a complete identification it can go down to the varnish.
  12. But over long periods of time, doesn't the back distort also? So, maybe long posts have a slow motion effect on the sound and some (decades or centuries long?) longitudinal study would be needed to measure the changes?? The same long length sound post would initially push and distort the top and then, over time, would the top relax as the back starts to distort.
  13. I know very little about this violins worth...but, might a heavier built still well made violin with good sound keep that good sound? I had a thin, light Chinese cello and it developed a wall crack. It had a great sound when we bought it ...lively and projecting but rich and smooth enough. Considering the repair and maintenance and temperamentality of violins, might a slightly heavier but still good sounding violin be easier and less costly to maintain? Especially for the amateur/semi-pro player?
  14. Yes, correct. It has been a few yrs since I was in China but a friend of mine there was a reporter and a party member. Quite liberal I think but he knew what side of the bread was buttered. So he reported 'correctly'. Interesting video to me of 'hand crafted mass production' of student violins. Does all the constant repetition of one task make one an expert of bored or something in between? https://www.youtube.com/watch?v=0SvfNhMlnBE&t=1s&ab_channel=Stentorstringedinstruments
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