@hemmer if you really want to go off the rails with this you could try just outputting the individual filter poles, or have a mix input for them. That’s the approach I took with the Pole Dancer analog hardware filter. Then I’ve a second module that defines the mix levels for various filter modes. That does a couple things: you’re not limited to only a couple filter types, and you can do crossfade/morphing between filter modes. VCV Rack is an ideal environment for this type of thing, as it’d be difficult to do something like this in physical eurorack. You get the full flexibility of using other Rack modules to define the crossfade, and basically unlimited module instantiations for filter types. I posted about it awhile back here: Zoxnoxious analog synth VCV Rack demos - #58 by brer_rabbit
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