Just as an appetizer here is an extract from "any of the literature on teaching or learning violin," as you put it.
Um, I was hoping for something written by someone besides yourself.
Violinists don't play 90% of the time with violinists. They play all sorts of gigs. Seriously I know tons of professionals string players. They take whatever gigs they get.
OK. But talk to them about what they listen to. The ones I've talked to listen, (as I said) to their stand partners more than anything.
I questioned your assessment that you assume that if the difference of 3mm in string length is to small for a violinist to bother with. That is nonsense.
Duh. First, you completely misunderstood. I'm saying that the 3mm is the difference in *finger position*. String length is standardized for violins.
If you create a scale in Pythagorean fifths you end up with a pthagorean comma at the octave that sounds horrid. I still don't think we are talking about the same things here.
You totally don't understand pytahgorean tuning if you think there's a comma at the octave!!!!
Octaves are pure in pythagorean, as are 5ths. If you cycle all the way through 12 octaves you hit the comma, but you'd have to be a dog to hear it. MMmmm. Muttley, eh?
But name any piece of music commonly played that cycles through 12 key signatures. Most of them stick to a range of maybe 4 1/2 steps (example 1 flat to two sharps). Yeah, if you were Bach and you could write a piece to show off the wolf, and you could catch up a violinist. But why would you? The literature leaves open the possibility that violinists will move the wolf to the other side of the circle of fifths on the fly. That's my theory, but no evidence supports (or denies) it.
but I don't think the physics has changed.. Doesn't mean that modern composition is not done in 12ET and that violins don't have to respect that.
I listen to the radio, and I go to a lot of concerts. Where do you go to hear modern composition???
I'm going to do you a favour and chuck a shit load of of reading your way next week when I'm back at Uni you'll be able to study exactly what 12ET is and how it works.
Don't bother. Not interested. Been there, done that.
Like I said though, please cite any peer-reviewed study that supports your contention of violinists playing 12ET -- let me add -- in common practice!
Yeah, sure, there's some funky modern stuff. But no one's really playing or recording it, so what difference does it make? Going back to bagpipes, Maxwell Davies wrote a piece for bagpipe in a=440. All modern bagpipes are a=475 or higher. So what does Davies' piece prove? Bozo composers can write anything, even if musicians don't normally play it. My bagpipe teacher recently performed the piece. She pointed out some of the bizarre ornaments, and her teacher said, "well, but you'll play it however you want, right?" That's the theory vs. reality that I brought up before. It doesn't really matter what the theory says if real musicians aren't doing it.
On the violin resonance (since you asked): The strings are tuned in perfect intervals E A D G. If you play an in tune E on the A string, it will (by definition) resonate with the E string. If you play an E on the G string, or a G on the E string, or any other note on any string that has the same name as any open string note, it will, by definition, resonate with the open string.
This "fact" is known by all violinists. Ask any of them. Now name which scale has E, A, D, and G all in perfect fifths. Since violinists play by muscle memory (ask one), it follows that the fingered note B on the E string will be in the same position as the fingered 5th on the other three strings, so you can add B to the circle of perfect fifths. Once you've got that much of the scale locked down you start looking at the intervals. G to A, or D to E -- a whole step -- is proscribed by the open strings. So now you've got whole steps and 5ths built in. You've also got 4ths, 7ths, and 3rds, if you count the B on the E string. G to E gives you the 6th. The only interval lacking is the 1/2 step. To get the 1/2 step, you've got to take that E up two more fifths past B. But you can get there, and it works.
I'm sorry you couldn't open the violinmasterclass website. It's a robust server, so there's a problem on your end. Try a different browser. The information will be worthwhile. They explain how to derive a violin scale on the instrument, and further, how to derive double-stop notes. The violinists who created the website are top notch. They teach reality. Alter your theory as necessary.
OK, now forget about all the theory. Use your ears and go find me any recording with brass in a rock setting that is ET.