[sdiy] vcos

[cs e]

With a spectrum analyzer, one could measure "phase noise" of various
VCOs.  Wouldn't phase noise effect "the sound"?

Chris

On 4/8/09, Tom Wiltshire <tom at electricdruid.net> wrote:

>
> Yes, but no spectrum analyzer I've ever seen would provide enough
> detail or resolution to identify the subtleties we're talking about.
> Probably that's just because I'm always on a budget! Maybe decent
> (euphemism for "expensive") tools would be able to do the job.
>
> Still, it might be interesting even with a basic analyzer. I think
> this kind of discussion needs to be much more based on measurable
> facts than they usually are, and this is one way to provide some
> actual evidence, instead of the typical "VCO type Q is much better
> because it has/doesn't have jitter/leading edge artifacts/distortion"
> with no proof offered.
>
> My own slant on this is that (like Seb) I think digital has reached
> the point (increased accuracy and sample rates) where we can
> reasonably expect to model more or less whatever analogue weirdness
> it is that makes a great analogue synth great. However, in order to
> do that, we first need to study and understand that technology and
> it's faults/features in some considerable detail. I don't think this
> information is widely available, although some research must have
> been done.
>
> T.
>
>
>
>
>
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