i wrote an article for popular science august 2004 issue on how to change the voice of an aibo ers-7. the reason i wanted to do this is because sony really goofed when they added a "human" voice to latest edition to the aibo robot dog series, what made aibo cool was that it didn't actually talk in some lame "show me to your leader" voice. but after poking around on the memory card(s) and reading up on the aibo file formats and tools, you can change the voice to something a little more r2-d2 and less c3po.