[4k93n2]

the 'light pedal' by gamechangeraudio would pair well with this. it uses a real spring inside the pedal to create an analog spring reverb. theres also some sort of laser used as well since the spring isnt long enough

https://gamechangeraudio.com/light-pedal

there is also their 'motor pedal' which uses a spinning motor similar to one that would be found in a drone, and then a laser again or something optical to pick up the movement and turn it into a digital signal.

they actually have a synth that uses 8 of these motors to generate the sounds/voices

[kazinator]

Motors spinning shafts that produce signals is a very old technique, dating back to the Telharmonium [1897], whose tonewheel technique was also used in Hammond organs [1935].

https://en.wikipedia.org/wiki/Tonewheel

Speaking of spring reverbs: you can use a cheap piezo transducer mounted on the tremolo springs of an electric guitar as a passive reverb. Waylon MacPherson demonstrates this in his YT channel: it actually sounds good!

https://www.youtube.com/watch?v=XP5pJLgHrgw