"Amethyste: "When you play the theremin: brain signal ~> Looooooooong signal to the hands ~> find your position ~> Play the G note ~> hope you are on key." "
The brain gets in the way. I suspect that over time precision thereminists acquire a hand/ear coordination that could be compared to the hand/balance coordination that you acquire after riding a bicycle for a while, a shortcut that skips the slow conscious processing of the sound. Part of the bravery of the precision thereminist is in trusting this process.
Well ... I guess that's also why it's QUITE one of my trickinesses to play live in front of a group of audience ;-) I mean, with keys, I quite have some stage experiences since I was 8, but with theremins, it's always something different, as I always should sound check before (I think that's the best thing) to at least get used on the accoustics and the way how your theremin acts in this environment, but also when you use a "strange" equlizer par example, you should get used to it's sound first ;-)
Another thing is, that I recognise what you say Gordon, about the brain thingies ... It's also in the beginning with playing ... Most people are used to make simular parallell movements with both arms, so it can be quite tricky for newbies to get their brain halfs adjusted to the way of basically managing the volumeloop and the pitch antenna ;-)
"I don't understand why all Theremins don't have some kind of visual tuner built in to them. I believe I see some kind of tuner plugged into Barbara Buchholz's (RIP) tVOX Tour in her photos and vids - which makes infinite sense."
On the occasions that I saw Barbara play she did not look at the tuner whilst playing, only whilst adjusting the pitch field of her theremin and to find her starting note, as one would use an audio pitch preview.
My personal opinion on this, is that - If you should use it in the way of knowing which tones you are playing - you'll screw off the idea/intention of playing a theremin, and indeed what Gordon says, I think this ONLY is useful to adjust the pitch field ;-) I guess that also should take a lot less time with such a visual tuner, nevertheless I prefer to use my ears for this, as I also think that each thereminist finds his/her own way to get the right pitch field tune adjustments ... Every person is also different ... I guess I have shorter arms (par example) than Barbara had (so she used another adjustment for th e pitch field range as I'm doing), so that (and other things) makes things different for each of us, as my system might probably not be yours, it's just what's personally is easy for us which adjustment to use ...