[sdiy] Odp: Pink?

[Ian Fritz]

mr — 

I figured out a way to do pretty much all of this years ago. You may find it on my website as The SNICster waveshaper. (There was also some discussion here.) It is driven by a standard Saw-core VCO, and I believe most of your requirements are automatically met.

Ian

ijfritz.byethost4.com

> On Aug 21, 2018, at 4:01 AM, Mattias Rickardsson <mr at analogue.org> wrote. 
> Designing such a slewed sawtooth VCO in a more thorough fashion might be somewhat of a heavy exercise. I'd want the slewrate to be a controllable parameter; I'd want it to follow exponential and linear control - something that would need to work regardless of the slewrate used; I'd want the timing of other generated waveforms to follow the zero crossings and not the peaks of the sawtooth; and finally, for FM duties and freedom of thumps I'd want the saw to be DC-free, meaning that the start and end of the slewed reset slope would need to be equally far from zero - which wouldn't be the case of an ordinary sawtooth with a slew function hung onto its output.
>