Heard/seen a few different ideas on making sliding CV/Note keyboard-slider's, like making one using VHS tape or dedicated slider pots that have some resistance, etc. - but what about instead of having a keyboard to have a slider + on/off button/contact and to use a potentiometer, with some geared wheels and belt or something like that. It's mainly for the performance purposes. Had any of you made anything similar? would love to see a different thoughts. Do you think it's even worth to try? Yes, I believe it's nothing new, but how would you achieve it - some tips and tricks would help a lot.
Ondes Martenot: en.wikipedia.org/wiki/Ondes_Martenot You'll notice the "ring" controller...this uses the same loop-strung control method you're detailing, but on a larger scale and for dedicated (pitch) purposes.
This is something I was thinking about many moons ago but put it in the too-hard-basket.
However, that was in pre-arduino, even pre-internet days.
I think it is doable. maybe cruising the streets for some discarded printers might yield some stuff to play with.
a small timing belt and two timing belt pulleys would be the go.
I was imagining a fairly translucent timing belt so I could put a LED ladder underneath. A half-baked extension of the idea was to set up a strain gauge between the axles so you could measure downward pressure at the same time. I still think this would feel great to use as an expressive controller because your fingertip is not sliding across some material.
I'm happy to give feedback if you want to try this. Bear in mind though that it will be pretty chunky, no matter how small the parts are for it.