MOTM

>>How'd you do dat?<<

I was hoping somebody would guess.  Actually it's quite simple.  Just one 
VCO, one VCA and two cables.  Use one waveform for the audio input and 
another for modulation input.  It can even be the same waveform.  For example 
if you want a curved sawtooth, just modulate a sawtooth with itself.  The 
Bias knob is good for chopping waves down or adding flat parts.

>>it would be really awesome if you put samples up there of what these sound
like... esp. that notched sine and the discontinuous thingy beneath it!<<

You can patch them up to hear them.  Like most static waveforms, they aren't 
all that interesting in themselves, althought the bottom right one gives a 
pretty semi-oboe semi-Carlos type sound when used in a patch.  If you don't 
want the obvious sounds of the built-in VCO waves, it can give you something 
a little different.  It turns out that sometimes looks can be deceiving 
though.  For instance it's also possible to get a notched sine by just mixing 
an inverted pulsewave with a sine.

However, using this technique I'm able to get something similar to pulsewave 
modulation.  But instead of a nasal sounding pulse sweeping to a hollow 
square, a nasal sounding wave can be swepth to a sawtooth sounding wave.  
Possible string/brass applications.

In the picture below, to get a little more complex I added a mixer inbetween 
the VCO and VCA.  I used two waves to modulate a third and was able to use 
the inverting capability of the mixer.  Doing that I was able to get what 
looks like a wave that alternates between full cycles of a square and a small 
sine wave.  The bottom waveform is nothing more than an inverted tri added to 
a sine with a mixer.

http://members.aol.com/elhardt/morewaves.jpg

-Elhardt