[sdiy] SAW core VCO flyback time

[Richie Burnett]

That's an interesting way of looking at it, and the conclusion is very true!

-Richie,

Donald Tillman wrote:

>From a wide angle view, the saw->triangle shaper is taking a sharp pointy 
wave with a lot of harmonic content and making it into a less pointy wave 
with very low harmonic content.  A sawtooth wave has 39% harmonic content by 
power, and a triangle wave has 1.5% harmonic content by power.  And because 
there's so little harmonic content in the intended triangle wave, any faults 
will stand out for all the world to hear.

But if you do it the other way, start with a triangle wave core and derive 
the sawtooth, any glitcheroos in the process will be swamped out by the 
regular harmonic content of the sawtooth wave.

So the triangle->saw converter has math and psychoacoustics very much on its 
side.

Practical result: you can hear differences between VCO implementations much 
better by listening to the triangle waves.

  -- Don