vanilla implementation of a TPT state variable filter. would not be possible without Will Pirkle’s AppNotes4 pdf.

first inlet is the signal to be filtered. second inlet is the cutoff frequency in Hz, can be a message or a signal so envelopes are compatible. third inlet is resonance, a value between 0.1 and 10, this is a message only inlet.

first outlet is lowpass output, second is highpass, third is bandpass. apparently these can be added/subtracted with each other and with the input signal in various ways to get other filter types. don’t know anything about that