Vortex Sound Research

Is it possible to get a second VCO plugged into DV to mix to VCO's through that filter?

Black Corp's website seems to somewhat allude to using Rachael together with DV as a second VCO? But I can't find a manual or really any great information on either unit anywhere, and just looking at the panel it doesn't look like DV accepts an external signal in?

I'd love to get a couple detuned VCO's through that filter without having to buy two DV's!

Thanks!