This is cool but I'm curious why it sounds so much worse than the built in speech to text API
http://greggman.github.io/fanfictionreader/
Which voices are available are browser and OS dependent and there's no "borg" voice anymore. There used to be several alien and or non human voices but Apple removed them from the OS and most browsers just call the OS's text to speech API
--correction--
You need to go into the VoiceOver Utilities and add all the novalaty voices back in