[sdiy] VCO - sine output - why bother?

[Mattias Rickardsson]

Den 28 aug. 2016 10:16 em skrev <rsdio at audiobanshee.com>:
>
> ... Any input to the VCF will affect the resonant frequency, making
tracking problematic. ...
>
> There have been many times where I painstakingly adjusted resonance and
keyboard tracking on a VCF to get a pure sine wave that was playable, only
to have the tracking ruined when I mixed in other waveforms or even noise.
Try it out!

I have the feeling that I've heard and even read about this phenomenon for
ladder filters specifically... but that it's less of a problem for
state-variable filters. But I might be wrong. What filter topologies have
you tried this with?

/mr
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