CEM3320 low pass filter build

[analogoutput]

@Sonosus

Electric Druid pole mixing filter

I don’t have the final front panel yet, but this module seems to be working: [PXL_20230503_231205738.MP] It’s a multimode VCF based on a (partial) design by Electric Druid. I made a number of modifications but the basic design is not really changed. It uses pole mixing to achieve different filter responses. The Shape rotary switch allows selection of two different low pass, two high pass, two band pass, and two notch filter shapes. The latter two can be altered by changing resistors on the P…