CATALINBREAD KNIGHT SCHOOL FILTER - DIY KIT DIYIf you've ever heard a synthesizer in action, chances are you've heard of a low pass filter, a powerful tone sculpting tool whose nuts and bolts increase exponentially as utility increases linearly. Found on even the earliest examples of analog synthesis, the low pass filter establishes a cutoff frequency, and then rejects all frequencies above it at an intensity determined by the filter's construction. We've taken that guesswork out of the picture,