[sdiy] VCO Linear Voltage

[John Mahoney]

>How is the linear voltage control of frequency useful on a 1 volt per octave
>VCO?
>...
>What am I missing here? Is this useful for modeling the timber of some
>certain instruments or perhaps other acoustical artifact?
>- Jerry

Patching a VCO's sine output to a linear FM input yields interesting 
timbral changes. It needs to AC-coupled, though, or the pitch goes 
wild. At least, that's what they tell me. To be honest, I've tried it 
and the pitch has varied even when it's AC-coupled -- but I did like 
the timbral change.

You can also use linear FM to generate voltage-controlled beating, 
which sounds different than tremolo from a VCA. (I believe that JH is 
a fan of this.) Oh, sure, you can use expo FM to induce beating, but 
the beat frequency is not as controllable as with linear FM.

John