[sdiy] Henry Walmsley's page

[Ian Fritz]

At 01:15 PM 12/23/2009, Tom Wiltshire wrote:
>>  (A single pole filter changes a step into a ramp, no?)
>
>Ugh, no. A single pole filter changes a step into a weird curvy thing
>that's nearer a shark's fin than a ramp.

Ummm ... I believe if the frequency is low enough it is just an integrator, 
which turns a step into a ramp.  :-)

But if you want to smooth the steps out you would probably use a higher 
order filter, so you don't loose too much amplitude.

I've had my original ten-step VCO for about 35 years now, and I have almost 
never had trouble with too many harmonics.  Yes, interpolating or not is a 
matter of taste. But how do you know until you've tried it?

   Ian