That&#x27;s what got me interested in speech synthesis as well. It seems very possible to do in software, the patent is quite interesting to read : <a href="http:&#x2F;&#x2F;www.google.co.uk&#x2F;patents&#x2F;US2121142" rel="nofollow">http:&#x2F;&#x2F;www.google.co.uk&#x2F;patents&#x2F;US2121142</a>. Not sure when it expires these days...