Something new that’s popped up recently is the Landscape.fm Noon. It’s a passive filter topology that can produce very complex and delicate sounds. Passive filters are capable of a broader response **for varied inputs than active filters IMO. I wonder if this is because they are less prone to resonate, dunno. Interestingly the only passive filter in eurorack is the aging Trouby Organ Filter that was built to transform organ voices into woodwinds. Rossum Morpheus has these types of filter profiles but I hear it distort when used for percussion duties (as an effect or pinged), which can be 🤗 or 😶