This is a soft question. I play classical guitar and I find stringed instrument industry a very fascinating art. I know that, at least for classical guitar, this industry is still developing and exploring new techniques, so it is a very alive research field.
I know that it must involve at least some basic mathematics, but I was wondering if anyone has tried to apply deep mathematical tools and concepts in this field, for example from geometric analysis.
On the other hand I guess that these techniques could inspire very interesting mathematical questions.
What is the state of art of the interaction between maths and stringed instrument industry?