Actualy I sold a design for a voice recognition system to an american company a few months ago where it is being developed into a comercial system,and it is very much do-able with a 8052 however last time i tried to explain how it worked to someone from here they were not impressed by the fact that its not a simple process.The algo I used is now the subject of a couple of patent applications so i cannot say much about it but a lot of the ideas where taken from image recognition.