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Voltage controlled low pass filter with resonance schematics, anyone?

Can anyone provide a link or schematic for an audio low-pass filter with resonance, with the low pass frequency able to be controlled with varying voltage? I'm hoping to make something like the moogerfooger, but I don't need an envelope filter.

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This one is just BEAUTIFUL
http://www.musicfromouterspace.com/analogsynth_new/STATEVARVCFFEB2006/STATEVARVCFFEB2006.html

Don't ASK how it works, unless you have a lot of calculus.
aelias36 (author)  steveastrouk5 years ago
Great! That's exactly what I was looking for. Not exactly small on parts, but it sounds great and is *much* cheaper than buying one. Any recommendation on how to get the -/+ 12v? I'll just use a computer PSU for breadboarding, but if i need to put it in an enclosure, and I need a good way to power it.
Its dead easy.

Get a mains transformer preferably centre tapped. Tie the tap to ground. Put a bridge rectifier across the other two terminals. Take positive juice off the positive terminal and negative juice off the negative terminal.

Connect a nice fat (try 1000uF) capacitor across the positve supply to ground, and another from the negative supply to ground.

Wire a 7812 regulator from the positive supply and a 7912 regulator from the negative.

Make sure you FUSE the input to the transformer - and I usually fuse the outputs too, using slo-blo fuses.

aelias36 (author)  steveastrouk5 years ago
Thanks!
akanksha195 years ago
do you have any idea of design of cerberus filter ????
Do you mean like this ?
http://fluxmonkey.com/electronoize/opampFilter.htm