It seems to me that you do not know how it works, see the video:

https://dlive.io/video/zygibo/5fe19270-1f30-11e8-be01-5bf7a6e5d482

Chat reader TTS is very useful for streamers-players who do not have time to read the chat manually. "Upvote MP3" is just one of the additional features I've added.

It can also be useful for people who want to know if someone has already given upvote under their post on steemit. Just leave the page in the background and hear who and when gives UP.

Give it a try:
https://zygmunt.pro/apps/tts/result.php?lg=UK+English+Female&v=7&link=the3metrewrap%2F7f256da1-302c-11e8-9747-0242ac110002