It’s not a new hack but it will work well if you have short texts (1-3 sentences) that you wish to convert to speech.
After all, when returning a response to the Google Assistant, you can use a subset of the Speech Synthesis Markup Language (SSML).
Because you can make your agent’s responses seem more life-like experience.
Open your terminal and try something like this:
curl "http://www.google.com/speech-api/v1/synthesize?lang=en-us&text=actions+on+google+rock" -o aog-rock-hack.mp3
If you want to use SSML and get fancy, it’s also support it in the request:
Later you can use it in your Action on Google like that: