Barton Switched Resistor VCF BMC34 PCB
Dual switched resistor mulitmode VCF
This is an all analog multimode filter module that employs resistors with analog switches to control frequency cutoff. The module has two filters built in which share a common frequency control, these can be used in series for heavier filtering or in parallel to process stereo signals.
There are Eurorack and MOTM power connectors.
BOM/build doc