LED knobs that show incoming CV

[mother misty]

So imagine a knob with a LED inside it (similar concept as the knobs you find on René II for example), now imagine this LED (knob) shows the incoming CV/modulation (brightness=CV amount color=bipolar/unipolar), has this ever been done?
My Monsoon has such LEDs in slider form that shows the incoming CV for that parameter, but I’ve never seen in it knob-form. How cool and useful would that be, you could easily see which parameters in your system are receiving modulation. Has this ever been implemented in a eurorack module, just wondering?

[XODES]

Did something similar in my PV44 module for the modulations :

https://www.modulargrid.net/e/xodes-pv44

Even though it's possible as we can find clear shaft pots and clear knobs, in my case the light doesn't come from under knobs, but from underneath the markings around the knobs instead (blue = negative, yellow = positive).

[adaris]

Yes, it's been done, I have a MicroTides from Michigan Synth Works that does this:

https://www.modulargrid.net/e/michigan- ... enuverters

And yeah, I agree, it's pretty cool.