First, you have to add your name to the TikFinity Mobile app.
You have to tap on your avatar in the upper-left corner of the TikFinity Mobile app. Once done, you have to tap on "Switch account". In the next menu, you have to tap on "+ Add Account" and type in your name. Then confirm this.
Once done, tap on "Start Sound Alerts & Text-To-Speech" while you are live on TikTok to start the Alerts and Text-to-Speech feature of the app.