[sdiy] Harmonic content of the "sigmoid" half-sine wave

[David G. Dixon]

Oh yeah, I almost forgot!  What would also be cool is the ability to morph
the incoming wave from saw-to-triangle-to-ramp, and put that into the sine
shaper.  This is easily done with a couple of diodes or a couple of JFETs on
the triangle core.  My LFOs do this, and they can generate frequencies into
the audio range.  Maybe I'll rig that up through a sine shaper (too bad I
didn't put sine shapers on my LFOs!).