Trying to emulate how pianos have staged tones/resonance layers as the keys go up in pitch. Not sure how accurate it is, but it gets sort of close. At least you can get some idea of how that works.

Might work better with ring-mod or string simulating oscillators, but that just gets more complicated. The idea is to use something with the resonant tone or timbre that the piano strings would produce and stage/filter in a similar manner.

Using Bog Audio’s assign, because it allows for a more drawn out sustain sound. So there’s also some poly stuff that could contribute to a bit of overhead here.