[sdiy] Single chip (3 opamp) wave multiplier

[Martin Czech]

:::Then maybe the similarities are just for the ear, the "similar to something
:::familiar" (linear BPF sweep) but somehow "alien" because not identical.
:::It's entirely possible that both FM and Shaping just share a similar degree
:::of being "alien and yet familiar", without necessarily being too close to
:::each other.

On the scope it looks sometimes quite similar. I've listened to some
shapers and was imideately reminded of zero carrier FM.  It is clear to
me that the math is different.

At least now I understand how these AD sin/cos chips work. (schemos on
my site) Does that mean that they have only one transistor per 90 DEG?
That would be a pretty crude approximation.  I guess when flattening
is most needed another transistor stage turns on, first flattening the
response then turning it down again,] towards 180 DEG and so on.

m.c.