It's important to focus on perceived value. She may just be using an ASD, but instead of the typical advice to DHV you may have to DLV and neg yourself.
Is this some lingo I'm not hep to, or are you giving advice for some sort of audio-visual setup?
Regarding the OP though: when she's not talking much, just talk a bit more than you normally would, ask her questions and joke around with her to try to get her to open up. Consider playfully/jokingly mentioning her quietness and see if that leads to her talking about it or something. The movies is a horrible idea, yeah, and King is right about alcohol.
Good luck though. In my personal experience, the "quiet type" are often the most interesting people once you get to know them (and generally are by far the best sexual partners [though take that with a grain of salt, actually, because that's a huge generalization and you and I may very well prefer very different sorts of lovers]).
