Can a functional duplicate lack qualia?

Continuing on Ned Block's "Troubles with Functionalism" (1978) and David Chalmers's "Absent Qualia, Fading Qualia, Dancing Qualia" (1995).

What would it be like to be halfway between person and machine? If you think the machine can't have consciousness, then Chalmers thinks that there's no sensible way to describe such an experience, ergo the machine (if functionally equivalent to the person) must have consciousness after all.

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End song: "Machine" by Helen Money as interviewed on Nakedly Examined Music #101.