Google Cloud TTS Service uses the non-free Google Cloud Text-to-Speech API to convert text or Speech Synthesis Markup Language (SSML) input into audio data of natural human speech.
It provides multiple voices, available in different languages and variants and applies DeepMind’s groundbreaking research in WaveNet and Google’s powerful neural networks.
The implementation caches the converted texts to reduce the load on the API and make the conversion faster.
You can find them in the `$OPENHAB_USERDATA/cache/org.openhab.voice.googletts` folder.
Be aware, that using this service may incur cost on your Google Cloud account.
You can find pricing information on the [documentation page](https://cloud.google.com/text-to-speech/#pricing-summary).
## Table of Contents
<!-- MarkdownTOC -->
* [Obtaining Credentials](#obtaining-credentials)
* [Service Configuration](#service-configuration)
* [Voice Configuration](#voice-configuration)
<!-- /MarkdownTOC -->
## Obtaining Credentials
Before you can integrate this service with your Google Cloud Text-to-Speech, you must have a Google API Console project:
* Select or create a GCP project. [link](https://console.cloud.google.com/cloud-resource-manager)
* Make sure that billing is enabled for your project. [link](https://cloud.google.com/billing/docs/how-to/modify-project)
* Enable the Cloud Text-to-Speech API. [link](https://console.cloud.google.com/apis/dashboard)
* Set up authentication:
* Go to the "APIs & Services" -> "Credentials" page in the GCP Console and your project. [link](https://console.cloud.google.com/apis/credentials)
* From the "Create credentials" drop-down list, select "OAuth client ID.
[https://accounts.google.com/o/oauth2/auth?client_id=<clientId>&redirect_uri=urn:ietf:wg:oauth:2.0:oob&scope=https://www.googleapis.com/auth/cloud-platform&response_type=code](https://accounts.google.com/o/oauth2/auth?client_id=<clientId>&redirect_uri=urn:ietf:wg:oauth:2.0:oob&scope=https://www.googleapis.com/auth/cloud-platform&response_type=code) (replace `<clientId>` by your Client Id)
