Hello friends,
I’m sharing the Korg 700s VCF and VCA, which I built based on the original circuit diagram!
Sound Demo: https://www.youtube.com/watch?v=HyofTpl9yVE
The power supply is +20V / -10V and works very well!
At +/-15V, resonance is lost and the audio signal is quieter!
The CV control with ADSR is unobtrusive and works well! It only works poorly with my 5V sequencer, but with this CV mixer from Doepfer (DIY) it’s considerably better:
…under section: “3. Circuit examples”!
It’s certainly a bit complex to build, but that never scares me. What matters is the final sound.
Maybe someone has an idea how I can make the VCF +/-12V or +/-15V compatible!
And the VCA:
