Wherein we present a TwoZero filter for removing unsoundly frequencies.
Right-click to copy examples to your workspace

A two-zero digital filter can act as a bandreject or notch, filter that attenuates frequencies near its zero. For more details, see Smith/CCRMA.
NotchFreq is the resonant frequency meaasured in Hz.
Radius is a measure of the filter quality and usually be in the range .5-1.
Because this filter removes signal energy, it will generally be quieter.
Always monitor your gains accordingly.
Gain multiplies the incoming signal prior to filtering.
op allows you to bypass the filter by selecting passthrough.
Here we control NoiseCtrl with AbcSequencer
to produce controlled bursts of white noise. That signal is routed into TwoZero
whose Radius is automated by a Sine wave between .5 and 1. Inside
Channel you'll also find an NRev reverberator.
