I used an ARP Odyssey synth a couple decades ago.  It had a feature called "phase lock" where you could use one oscillator to trigger the other.  Had really great vowel-esque sounds.  Prominent example on this old Cars tune "Let's Go":
 
http://www.youtube.com/watch?v=GtgmNudoHgg
 
Any idea a VST synth that'll do that?
 
Thanks.
 
CAF

Crap, right after posting I try a patch in PSYN II and it does it.  Apparently you set "sync" between a couple of oscillators.  Duh.
 
Go back to what you were doing.  :-)
 
CAF