Does anyone know of any manufacturers that make modular VCOs with variable wave shapes ala the freqbox?
I love that sound of the Phatty or Voyager sweeping through different wave shapes similar to PWM… And it would be nice to have a modular version of one for that future modular… haha
What aspect of continuously variable are you looking for? Do you want a single pot that cycles between all of the available waveshapes and send that to a single output, are you mainly concerned with not having to choose a single wave shape at a time? I know how the Voyager and Freqbox work, but are you interested in other ways to vary a wave shape from a single output?
This is just off the top of my head before bed…
The Double Deka VCO- dual waveform generator with 10 sliders to let you draw your own waveform!
Dotcom Oscillator with the Osc mixer- will allow you to mix waveforms so you have a variable amount of each one available from one output.
Not sure but I think the Kobol VCO by MOS-LAB is variable (smoothly). If it isn’t you should get it anyway because it’s absolutely incredible.
Lots of Modular owners are grumpy and curmudgeonly (if that’s a word) and want to mix their own waveforms from traditional types, typically arranged as discreet waveforms per 1/4" jack. But certainly that is value in getting something that sweeps smoothly.
If you want MU, you should look around at Grove, Oakley, MOTM. I think the SSL (Steamsynth) is switched only between Sine and Square; fairly basic but is said to have a really nice sine wave if you are into that sort of thing.
I have two VCOs in my modular. One is a Freqbox, and the other is a Ring Modulator… hahahah I blew about $3G on sequencing gear instead and just use a few MU filters along with my Voyager Old School and Little Phatty. I was thinking of selling my dog to buy some VCOs but realized that a) she isn’t worth much and b) unless I can have either the Kobol or the original 921a/b MOS-LAB setup, I’m not going to bother. There is enough you can do with the basics that the Freqbox affords; may even add another one as people seem to be dumping theirs.
Here: http://www.youtube.com/watch?v=c24qgwYmvnY
My favorite part is when he gets SYNC running following 6:00
I understand people wanting to mix waveforms the way they want, the way i see it is that (and I may be wrong here), you get different timbres with continuously variable over mixed amounts of standard waveforms…
That mos labs one is exactly what i was looking for! It looks very interesting! Looks like it was a limited release though. I’ll have to keep my eye open for that one whenever I start my modular 
Thanks guys. Anyone know of any other continuously variable waveform VCOs besides the mos labs?
I totally forgot about the Kobol.
Check this out though:
http://www.youtube.com/watch?v=ss1wGuN28xw&feature=related
I want to set this up right beside a FFB for immense tweaking.
EM, How big is your modular now?
Here’s an EML 101’s variable waveforms on a scope: http://www.synthfool.com/eml101waveforms.avi
Sorry.. no sound.
You can also use the Q112 mixer as an osc. mixer. It costs less, too. 
That doubledekka is awesome!
Alternatively, you could also patch two waveforms from a 106 (or any oscillator) into a Q111 pan/fade, and use an LFO (or some other control source) to sweep between them… (this could be patched up using VCAs too)
Check out the Hordijk Harmonic Oscillator too. It provides CV input to dynamically modulate the timbre, and also includes a VCA - almost like a complete “voice” in and of itself. I use mine a lot.
The DDVCO has a ring modulator built in also, and I THINK it does some sort of basic sequencing. Its pretty advanced. $550. I talked to Doug Slocum a few weeks ago, he still has some ready to build.
Good to know. Still have some time before I start with my modular. Just got a DSI prophet 08 that im still trying to learn (I try to learn a synth for a bit before buying a new one)… But the more I read up and learn about synthesis, Im starting to think that a modular really is the way to go. So, its only a matter of time. I do want one bad, but probably wont pull the trigger til early next year if not later.
Cheers!
Though it may be outside the scope of what you’re looking for, the Serge NTO (New Timbral Oscillator) has a pot to sweep between waveforms as well as voltage control of the same.
Stephen
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Buchla’s scare me… haha
Buchlas scare my bank account. 
I think a B.F.U. is about $1407.00
To get a BFU, take the cheapest musical thing they offer. I imagine a BFU=$800.
Im sure Buchla’s are nice machines, and im sure they are very capable, but i havent seen or heard a demo of one being used musically… It always seems to be spacey bleeps and doots. Are they as good as the price tag would suggest? Does anyone here own one?
I took the average. They are so expensive because they pack so many features in there. It’s not like it costs 800 for a single osc or envelope generator.
http://vimeo.com/19084264
This is a nice one
http://vimeo.com/2219111
The same statement about teets and toots can be said about most synth demos on youtube…I know I have made my contributions.