Big Chief is just a small company. I don't think they have the capability to produce a figure with voice chips. Heck, I don't even think they could pull off a talking Dalek with lights and the extra production costs will undoubtedly be added into the cost of the figure making it even more expensive. And it would cause even more production delays. It's hard enough for them just to get 2 figures put out, let alone the ambitions for all of these additional characters. As long as they can nail the sculpt and production paint apps on a convincing Tom Baker likeness, that's the most important aspect to me.