Fake VCOs (was: Re: digital control of analog component question...)

[jhaible]

> Given all the 'analogue modelling' synths that have appeared in the last
> couple of years, somebody *should* have done it properly by now...
> They still need to take a good hard listen to some real analogue filters
> IMHO. I've never got beyond a digitally modelled filter to the point where
I
> formed an opinion on the accuracy the oscillator models.

I agree. I have discarded all I've heard after listening to their fake VCFs,
and didn't bother to examine their fake VCOs any further. So I cannot really
back up my asumption.

> In theory, I shouldn't be able to hear any difference between a perfectly
> looped sample of a few seconds of a real VCO, and the real VCO itself
> (monitored thru the same adc/dac chain).
> That's the theory...

You shouldn't be able to hear the difference if you play the sample *once*.
But our ears (and brains) are sensible for pitch variations over a much
longer span of time than a few seconds. I don't have the theory at hand for
that one either, but I'm convinced there is some valid theory behind that.

JH.