I do use Alfa VCOs (or anyways AI Synthesis does, and I bought the chips through them to build some of their VCO modules), but it seems weird you'd recommend th

I do use Alfa VCOs (or anyways AI Synthesis does, and I bought the chips through them to build some of their VCO modules), but it seems weird you'd recommend them over CEM, since presumably they're "ripping off" Curtis' design just as much as CoolAudio -- or does Alfa pay a licensing fee to CEM? You might be right that Behringer is bad for the music industry in other ways and that I shouldn't support them through CoolAudio, but I don't see anything wrong with cloning an old chip. Patents are for a limited time and I think that's a good thing. If CoolAudio made an identical copy of the chip layout, maybe CEM could go after them for copyright violation, but I'm not aware of any claims that CoolAudio did that.