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Overview

Azure Cognitive Services provides high-quality text-to-speech synthesis with two service implementations: AzureTTSService (WebSocket-based) for real-time streaming with low latency, and AzureHttpTTSService (HTTP-based) for batch synthesis. AzureTTSService is recommended for interactive applications requiring streaming capabilities.

Azure TTS API Reference

Pipecat’s API methods for Azure TTS integration

Example Implementation

Complete example with streaming synthesis

Azure Speech Documentation

Official Azure Speech Services documentation

Voice Gallery

Browse available voices and languages

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Installation

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

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Prerequisites

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Azure Account Setup

Before using Azure TTS services, you need:
  1. Azure Account: Sign up at Azure Portal
  2. Speech Service: Create a Speech resource in your Azure subscription
  3. API Key and Region: Get your subscription key and service region
  4. Voice Selection: Choose from available voices in the Voice Gallery

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Required Environment Variables

  • AZURE_SPEECH_API_KEY: Your Azure Speech service API key
  • AZURE_SPEECH_REGION: Your Azure Speech service region (e.g., “eastus”)