SV: Re: [sdiy] Digital VCO

[Colin f]

> Just to be clear, I probably should have mentioned that the  
> aforementioned analog CV is not provided by or controlled by the  
> timer/counter chip, nor is it even directly related to the 
> CV.  It is  
> always provided by a DAC that gets its marching orders directly from  
> the CPU, which looks at the requested pitch value, and 
> outputs the CV  
> that's closest to the one that would be ideal for that pitch value.   
> These DACs usually have a seven or eight-bit amplitude 
> resolution, so  
> that's how much control they have over the ramp amplitude over the  
> entire frequency range of the DCO.

In the Juno 106, the integrator ramp control CV passes through one of three
different resistors (100k, 200k or 399k) depending on selected range.
So there are more effective bits than just the DACs.
 
Cheers,
Colin f