MFOS State Variable VCF
Original Schematic and other information: musicfromouterspace
STRIPBOARD LAYOUT
All decoupling capacitors, 100nF are soldered underneath the boards. Solder the caps across V+ and V- of each ICs.
FACEPLATE LAYOUY
It's actual size so you can use is as a drilling template.
3mm holes : mount screw holes
6mm holes : 3.5mm jacks
7mm holes : potentiometers
Hi, may I ask for some advice regarding the Resonance? Recently I've build this MFOS 12db state var. filter and it works like a charm, but when I turn the resonance all the way down, there is still a little bit of resonance audible. When I hook up my oscilloscope, I do see little spike edge at the start of the waveform (square wave), so basically my resonance knob isn't fully closing. Do you know which resistors to change to get zero resonance when the knob is fully ccw? so that I get clean square wave? Thanks in advance for your help.
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