Trying theses examples in the 0.15.7 version of atom-shell on a Mac with OS X Mavericks doesn’t produce any speech but also no error is thrown.
However, there’s one sign, that something went wrong. Logging speechSynthesis into the console, the flags speaking and pending are true.
The problem is, as far as I know, that there are no voices available. speechSynthesis.getVoices() returns an empty array.
@ghost If you are at *nix you can install
espeakwhich should populate voices array withespeakvoices. Have not tried electron, launching chromium with--enable-speech-dispatcherflag set at chromium results in audio output atspeak()call, without api keys.