How to add Voltage controlled Resonance to a filter-VCF

I personally think that voltage controlled resonance adds one more parameter to make interesting sounds with filters and should be a more common feature than it is right now on VCF's...I',ve been tinkering with ladder filters to understand how it all works and I must say i've learnt a lot.
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[@_marl3ne_]

lol.......when i saw the breadboard i subscribed HARD

[@CommissionerManu]

I have to give it a like for the intro alone, too funny mate 😂 great info as well, thanks!

[@Krzychu-bh4rl]

Nice, short, informative :)

[@RaysisPL]

I love your videos! The part where two guys fight made me crack up 😂😂😂😂

[@Afrorack]

Thanks

[@deadlinkofficialartst5592]

Of course you make that Ladder Moog filter😂well it is very good filter I'm not gonna lie about it😎

[@dialectricStudios]

legend

[@myweirdotheraccount2861]

I love your envelope generator!

[@argl4747]

Is there a particular reason why you use an OTA with fixed gain in the output section? 🤔

[@Afrorack]

Well I was using the lm13700 which has 2 OTAs...so the fact that I was already using one for controlling the gain of the resonance I dint want to waste the other...transistors or normal op amps can do the job of course...but also OTAs introduce more distortion which may add to the character of the filter

[@argl4747]

@@Afrorack thanks. I try to save parts as much as possible my self. wasting half a lm13700 would be a shame!