<p>Ykratka, that all sounds awesome, good luck with everything! As for the resonance question I'm not exactly sure... I know that the filters are based on RC resonance in the feedback loop, so looking at the schematic, try experimenting with different values of resistors using a potentiometer, probably R39 or R41 for starters, if that doesn't work I'm not sure how you could change it, other than using a different LPF design. For the band pass filters, BPF1 is the "low" end of the audio spectrum, with adjustable frequency center, and BPF2 is the "high" end of the audio spectrum. The frequencies are variable, with the BPF blend pot basically controlling the overall intensity of the band pass filters.</p>
<p>Good luck and happy hunting!
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