Variable ramp generator

[Haible Juergen]

	>It's cool, sounds fm-ish. You can just x-fade the saw/tri out. If
you've never 
	>seen this on a scope, too bad. It's cool to look at. Freq won't
change, just 
	>the wave morphing saw/tri. This can be simulated by grabbing your
saw >and
	>tri mixer knobs and twisting like mad in opposite
directions.....:-)
	>
	>A more reasonable approach is to use Juergen's pnp/ota x-fade
scheme,
	>two trannys and two otas and you're in business. 

I've actually done that, using the Interpolating Scanner (but a simple
VC crossfade will do), and it sounds nice, and it also looks nice on
the scope if you have the right polatity of saw wave (forgot which one).
But it's still not the same as the Korg LFO variable ramp.

I'll try Don's method some time. Looks promising, as everything from Don.

JH.