I started Schakelaar as the first #eurorack module I created using my own circuit from scratch (2023).
I found a way to turn a voltage into an address. if you use two comparators you can get 2 signals when the voltage is above a certain level. So it will give 0,0 if it is below all levels, 1,0 if its above the first level and 1,1 if its above the highest level.
The CD4052 has 2 channels of 1-to-4 multiplexers that take 2 bit as address. So of these 4, only 3 can be used. 0,0 (0) 1,0 (2) and 1,1 (3). The 2 channels of this chip, come in handy because 1 channel can switch the incoming signals to the output while the other channel can light up the right LED with a single resistor.