I only own an American Audio VMS2, but i think the issue’s the same. The controller takes the two mixer channels from the software separately and does the mixing and headphone routing internally, bypassing the software’s mixing engine.
Everything beyond that i can only guess, but maybe virtual dj doesn’t support this sort of bypassing (which would mean the software faders would have to stay open all the time, so the fader curves stay linear and headphone cueing can work properly), and maybe they simply didn’t midi-map the faders because of this.
Do a simple test: Open the line faders on the controller, and at the same time, turn down the software’s faders. Is sound still coming through? If there’s no sound, it’s just like i assumed (maybe this can be fixed in the audio options of the software). If there is sound coming through, then the bypassing works as it should and there must be a way to make the softwarte respond by remapping the controls. Unfortunately i can’t help you with that since i’m a happy mixxx user and have no experience with VDJ.
Was virtual dj bundled with the controller? Maybe you can find an updated or alternative mapping on the manufacturers website.
*edit*
Also the VMS2 and VMS4 can be switched between different audio modes, don’t know about the encore 2000 though. Take a look into the user manual to see if this might solve the problem.
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