foosnark wrote: ↑Sun Feb 21, 2021 6:42 pm
gentleclockdivider wrote: ↑Sun Feb 21, 2021 4:11 am
Notice how the drive affects the shape of the decaying amp envelope , and is just a post amp drive and not filter drive
"Filter drive" is not something exotic, it's just a drive stage in front of a filter. Assuming you are going VCO -> VCA -> VCF, any drive stage between the VCA and VCF is both "post amp drive" and "filter drive."
If you use the sawtooth oscillator shape (no filter, or LPF with the cutoff maxed and no resonance) and look at it on a scope, with drive at minimum and then maximum. You'll see that the drive stage pulls higher values down
lower than moderate values:
If you apply that curve to a decay envelope, you'll have a similar effect: it will rise a little before it flattens out and then falls, just like you saw.
Pick a sine oscillator, use an LPF or BPF, and play with the drive and you'll hear that the drive absolutely is in front of the filter, not after it. Bypassing the filter simply doesn't bypass the drive too, that's all.
You’re wrong
Most synths are vco—>vcf—>vca .
The vca is the final stage and it’s controlled by the vca envelope , the drive in warlock is POST vca ( after ) and distorts the vca curve ( see posted screenshots ).
A vca is in fact a a multiplier , it mulitplies the input signal and it's controlled a by direct control voltage ( the adsr )
On a modular synth you can directly route a vca to the ouptut ( feeding it a dc offset ) and you will be represented with actual shape of the vca contour.
Actual shape of an envelope ( only using attaack,decay stage )

Let's replace the input dc with an actual sine wave ( no dist ) , still nice looking contour
And let's now put a post vca drive ( like warlock )

And here we have pre vca drive(picture below) , the sine is saturated (becomes squarish )but NOT the actual vca shape
Of course the waveform in your screesnhot is also distorted because it goes into a distorted vca .
If the drive should be pre filter , and the amp has a nice decaying envelope ( or attackt stage ) , these stages should not be altered ( they would be remain exponential)
Again , the screenshots show otherwise , the stages are amplified because of the saturation and will look and sound sustained .
When you say filter drive is nothing esoteric , you don't even make any distinction between input drive , filter topology drive etc..
You have no idea what you’re talking about