[sdiy] Active VCO temp compensation

[Tom Wiltshire]

On 22 Dec 2008, at 11:43, Paul Perry wrote:

> The more people talk about temperature compensation, the more I  
> feel like
> keeping the whole damn thing in a temperature controlled oven...
>
> paul perry Melbourne Australia (not entirely joking)

The more people talk about temperature compensation, the more I think  
I need to build a DCO like the Prophet 08. Then I *can* have a proper  
analogue ramp wave with no aliasing *and* digital frequency stability.

After all, I haven't heard anyone slating the Prophet for not being  
analogue enough, or sounding "weak" or "thin" or any of the other  
rubbish people used to say about DCOs, when generally they were  
talking about synths that only had one master clock source and one  
oscillator per voice.

I've tried going the whole hog, but I have to say that I'm not yet  
entirely convinced by my wavetable oscillators. To really remove the  
aliasing completely is difficult and finishes up using up so many  
processor cycles that you can't do any of the interesting stuff.  
Ultimately, though, I think that has to be the way to go. We can't go  
on building sophisticated synths that have an incredible selection of  
**three** or (wow!) **four** basic waveforms!! Where's the sonic  
variety in that?!

T.