[sdiy] Basic Synth Patch? VCO-VCF-VCA

[harrybissell]

Michael Boracci wrote:

> Harry> But if you don't close the filter to sub-audio, and you have high
> resonance you will still hear the VCF when the notes are off.
>
> The sub-audio you are speaking of, is that the AM signal? I could see that
> creating a problem. Your solution of using the envelope to carry the AM
> signal would solve this, correct? The Sub-Audio would go away as the EG's
> release phase ended, I suppose.

No... I mean that the VCF cutoff is so low that you cannot hear any audible
sound.
If the VCF cutoff goes below 20Hz there is almost no chance you will hear any
output.

There is a good reason to have an attenuator (pot) between the VCO output and
the
VCF input... it allows you to run the filter overdriven, or underdriven...
different sounds
result. Could also by two different input jacks on a modular.. or a VCA, or
toggle switch...
or whatever

H^) harry