This is very cool thing. Violin and other bowed instruments' attack and release were impossible task for midi controllers and sound modelers to quite nail, but I believe this is a game changer.

Only thing is that you need skilled violin player trained to play on 2mm optical sensor if you want to record anything. And that is probably a good thing in the long run.

using touch controller on Novation keyboard

It think that bow is crucial for violin sound to be convincing.

Yes, that is true.

I only think that this sounds better than any conventional midi controller, even though you can make any sound in the nature in digital domain, or even model it by analog synths.

My personal opinion is that bowed instruments have always been a step behind pianos or percussive instruments and horns etc, and that this kind of controller that transfers players bowing technique to some midi parameters is nice thing. If you can theoretically do the same thing with a numpad, that's fine, but this is much much faster, if nothing else.

This is why I love PV. It's not just camera love, but all sorts of great multi media geeky gadgets, with a mixture of snark (Bolex) and politics. Thanks @Vitaliy_Kiselev !