Bandpass filter reimagined in 2HP

This isn't a voltage-controlled behemoth - eagle-eyed viewers will notice three pots: the top one controls the amount of current going into the filter; you'll notice it's effect most with harmonic-rich signals, whereas in other cases it'll provide a bit of attenuation - the setting will affect the amount of resonance, up to a point, but for most practical purposes it's a set-and-forget affair.

The other two pots are your more traditional cutoff and resonance - with the resonance cranked up the filter is extremely capable of self-oscillation and face-shredding feedback, whereas at more modest settings it'll add a nice bit of depth to your sounds.