[sdiy] Wave Multiplier-like circuits?

[Adam Schabtach]

Dear Lazyweb,

One of my favorite modules is Ken Stone's Wave Multiplier. I love the range
of timbres it produces from a single oscillator input and the way it
responds in interesting ways to control voltages. Hence I'm interested in
finding other circuits that do similar things, and would be delighted if
anyone has any to recommend to me.

There are a few I know about already. One is the Synthesis Technology
MOTM-510 Wave Warper. I have one of these and actually have somewhat mixed
feelings about it. Until recently I was planning to sell it but last time I
gave it a serious try I got some pretty neat timbres out of it. The other is
the Oakley Discontinuity. This looks very interesting and it may well be the
next one I build but I'm currently balking at the rather unfortunate GBP/USD
exchange rate. I'll probably get over this issue sooner or later, though; I
have several other Oakley modules and think highly of them.

I also know that there's at least one old Buchla module that does something
like this but I haven't yet chased down info, schematics, etc. Finally, I do
know of at least some of the classic diode-based circuits like rectifiers,
shapers, clippers, etc.

I'm not terribly interested in digital approaches because of the problems
(aliasing, primarily) inherent in digital non-linear processing. Nor am I
interested in processes that deliberately exploit digital artifacts, e.g.
downsampling and sample-rate reduction. I understand that some people like
these effects and I don't have an issue with that (and some of these people
are my customers--heaven knows I don't want to bite the hands that feed me)
but it's not the general effect that I'm after in this context.

Thanks in advance for any suggestions that anyone would like to provide.

--Adam