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
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
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].
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://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