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title Google ASR and TTS
description Google Cloud Speech-to-Text (ASR) and Text-to-Speech (TTS) Configuration
published true
date 2025-08-26 13:04:28 UTC
tags asr, tts, google
editor markdown
dateCreated 2025-08-11 10:53:39 UTC

Google Cloud ASR and TTS Configuration

Overview

Google Cloud provides high-quality Automatic Speech Recognition (ASR) and Text-to-Speech (TTS) services with broad language support and advanced customization options.

The ASR service (Google Cloud Speech-to-Text) supports real-time and batch transcription, optimized for various use cases including telephony.

The TTS service (Google Cloud Text-to-Speech) offers a wide range of voices, languages, and control over speech parameters like speed and pitch.

Advantages

  • High Accuracy: Advanced machine learning models optimized for telephony, video, and general-purpose speech.
  • Extensive Language Support: Dozens of languages and variants supported.
  • Customizable Voices: Natural-sounding neural voices with adjustable speaking rate and pitch.
  • Secure: Fully managed on Google Cloud with enterprise-grade security.

Supported Languages

See the official documentation for:

Generating Google Cloud Credentials (google.json)

  1. Sign in to Google Cloud Console.
  2. Create a new project or select an existing one.
  3. Enable the APIs:
  4. Go to APIs & Services → Credentials.
  5. Click Create credentials → Service account.
  6. Fill in the details and click Done.
  7. Select your new service account → Keys → Add Key → Create New Key.
  8. Choose JSON and click Create — the file will download automatically.
  9. Save this file securely and note its path — you will use it in the GOOGLE_APPLICATION_CREDENTIALS variable.

Google ASR Configuration


Google ASR

Environment Variables

Variable Description Example Value
PORT Port where the ASR module listens 6001
GOOGLE_APPLICATION_CREDENTIALS Path to your Google service account JSON key file /path/to/google.json
SPEECH_RECOGNITION_LANGUAGE Language code for recognition en-US
SPEECH_RECOGNITION_MODEL Recognition model (default, telephony, video, etc.) telephony

Docker Compose Example

  avr-asr-google-cloud-speech:
    image: agentvoiceresponse/avr-asr-google-cloud-speech
    platform: linux/x86_64
    container_name: avr-asr-google
    restart: always
    environment:
      - PORT=6001
      - GOOGLE_APPLICATION_CREDENTIALS=/path/to/google.json
      - SPEECH_RECOGNITION_LANGUAGE=en-US
      - SPEECH_RECOGNITION_MODEL=telephony
    volumes:
      - ./google.json:/path/to/google.json
    networks:
      - avr

Google TTS Configuration

Repository: avr-tts-google-speech-tts

Environment Variables

Variable Description Example Value
PORT Port where the TTS module listens 6003
GOOGLE_APPLICATION_CREDENTIALS Path to your Google service account JSON key file /path/to/google.json
TEXT_TO_SPEECH_LANGUAGE Language code for TTS en-AU
TEXT_TO_SPEECH_GENDER Voice gender (MALE, FEMALE, NEUTRAL) FEMALE
TEXT_TO_SPEECH_NAME Specific voice name from Google TTS voices en-AU-Neural2-C
TEXT_TO_SPEECH_SPEAKING_RATE Speaking rate multiplier 1

Docker Compose Example

  avr-tts-google-speech-tts:
    image: agentvoiceresponse/avr-tts-google-speech-tts
    platform: linux/x86_64
    container_name: avr-tts-google
    restart: always
    environment:
      - PORT=6003
      - GOOGLE_APPLICATION_CREDENTIALS=/path/to/google.json
      - TEXT_TO_SPEECH_LANGUAGE=en-AU
      - TEXT_TO_SPEECH_GENDER=FEMALE
      - TEXT_TO_SPEECH_NAME=en-AU-Neural2-C
      - TEXT_TO_SPEECH_SPEAKING_RATE=1
    volumes:
      - ./google.json:/path/to/google.json
    networks:
      - avr