Emscripten running a crappy voice synthesizer <i>might</i> work, but nothing close to the silky smooth voices that chrome includes.  It will really just add tons of bloat to the page.  Voice synth is truly something that needs to be baked into the browser.<p>Are you seriously implying that pocketsphinx in JS will do anything close to the level of voice recognition necessary to recognize pretty much anyone&#x27;s voice, sight unseen? I mean, <i>really</i>?  You kinda need to train the hell out of that thing to get it to recognize the difference between &quot;merry christmas&quot; and &quot;happy hanukah&quot;, and even then, it will only really work for one person.