Nigel thanks for your insight on why hardware never (or rarely?) had a
parabolic wave output. In a phrase, too many components.
Parabolic being not so useful? I'd say it's as useful as a triangle,
though that's not saying much.
OK, you say it's easy to make straight lines from a few components. What
of the morph from saw to tri, alternating one segment at a rising angle
with another at a falling angle? That's all straight lines, and it seems
(This video is a non-BWL oscillator though my BWL oscillator does the same
tri-saw morph, if not all of the other ones shown.)
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