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Overview

Google Cloud Text-to-Speech provides high-quality speech synthesis with two service implementations: GoogleTTSService (WebSocket-based) for streaming with the lowest latency, and GoogleHttpTTSService (HTTP-based) for simpler integration. GoogleTTSService is recommended for real-time applications.

Google TTS API Reference

Pipecat’s API methods for Google Cloud TTS integration

Example Implementation

Complete example with Chirp 3 HD voice

Google Cloud Documentation

Official Google Cloud Text-to-Speech documentation

Voice Gallery

Browse available voices and languages

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Installation

To use Google services, install the required dependencies: 
pip install "pipecat-ai[google]"

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Prerequisites

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Google Cloud Setup

Before using Google Cloud TTS services, you need:
  1. Google Cloud Account: Sign up at Google Cloud Console
  2. Project Setup: Create a project and enable the Text-to-Speech API
  3. Service Account: Create a service account with TTS permissions
  4. Authentication: Set up credentials via service account key or Application Default Credentials

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Required Environment Variables

  • GOOGLE_APPLICATION_CREDENTIALS: Path to your service account key file (recommended)
  • Or use Application Default Credentials for cloud deployments