This Service takes binary audio content (currently wav, pcm, mono) and sends it to Google Speech to Text API via REST.

In order to use this component, you need to set up a Google Cloud Platform Project, add a Service Account and assign the "Cloud Speech Client" Role to the Service Account. 

From the downloaded key JSON file, copy "private_key" and "client_email" content into the corresponding Site Properties.

Also, you need to activate Speech To Text API on that project.

After setting up a new phrase set, you need to copy the "Phrase set name" into the corresponding Site Property. That Site Property takes several phrase set names, separated by comma.