[sdiy] Sine VCO - tri to sine converter

[Richard Wentk]

At 15:40 28/03/2003 +0100, Czech Martin wrote:
>After some experience even 0.1% THD is audible.

But not necessarily objectionable. Musically and audibly there's a lot to 
be said for imperfect waveforms! I can't think of many applications where 
you absoluetly have to have a test-equipment quality sine for a patch to 
work. FM comes closest because any extra harmonics will smear out the 
timbre once you started piling on the Bessels, and I suppose the quadrature 
osc in a frequency shifter needs high accuracy. But other than that, as a 
standard patch element even as much as a couple of % of THD doesn't sound 
too painful.

In fact that's part of the grungeyness of the analogue sound. If you make 
some squeaky-clean digital sines in something like Csound, they usually 
sound too perfect to be musically interesting and you get that shiny 
fingernails-on-blackboard digital sound instead.

Richard