Authorizations
Supply the API Key in the HTTP-Header
The access token received from the authorization server in the OAuth 2.0 flow.
Supply the API Key in the Url-Query
Headers
The default media type is application/hal+json. Use application/json for pure data results.
Available options: 
application/json, application/hal+json, application/xml, text/xml, text/csv Query Parameters
Project id from which it will get the settings
Response
Returns the available audio preview voices