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日本語
中文

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Voice Settings ​

Overview ​

In voice settings, you can configure settings related to AI character voice synthesis. You can select various voice synthesis engines and adjust voice quality and parameters.

bash
# Voice synthesis engine to use
# voicevox, koeiromap, google, stylebertvits2, aivis_speech,
# gsvitts, elevenlabs, openai, azure, nijivoice
NEXT_PUBLIC_SELECT_VOICE=voicevox

Note

If Realtime API mode or Audio mode is enabled, voice settings will not be used.

Selecting a Voice Synthesis Engine ​

Select the voice synthesis engine used by the AI character. The following engines are supported:

  • VOICEVOX: High-quality voice synthesis engine specialized for Japanese
  • Koeiromap: Voice synthesis engine for Japanese with rich emotional expression
  • Google Text-to-Speech: Google Cloud Text-to-Speech service supporting multiple languages
  • Style-Bert-VITS2: High-quality voice synthesis engine with style control (supports Japanese, English, Chinese)
  • AivisSpeech: Japanese voice synthesis engine that makes Style-Bert-VITS2 models easy to use
  • GSVI TTS: Customizable voice synthesis engine
  • ElevenLabs: High-quality voice synthesis service supporting multiple languages
  • OpenAI TTS: OpenAI's voice synthesis service supporting multiple languages
  • Azure TTS: Microsoft Azure's multilingual voice synthesis service
  • Nijivoice: Japanese voice synthesis service with over 100 voices available

VOICEVOX ​

bash
# Server URL
VOICEVOX_SERVER_URL=http://localhost:50021
# Speaker ID
NEXT_PUBLIC_VOICEVOX_SPEAKER=46
# Speed
NEXT_PUBLIC_VOICEVOX_SPEED=1.0
# Pitch
NEXT_PUBLIC_VOICEVOX_PITCH=0.0
# Intonation
NEXT_PUBLIC_VOICEVOX_INTONATION=1.0

VOICEVOX is a high-quality voice synthesis engine specialized for Japanese.

Server URL ​

Set the URL to access the VOICEVOX Engine API. The standard URL for running VOICEVOX locally is http://localhost:50021.

Speaker Selection ​

Select from speakers available in VOICEVOX. You can test play the selected speaker's voice with the "Test Voice" button.

Voice Parameter Adjustment ​

  • Speed: Adjustable in the range of 0.5 to 2.0 (higher values make it speak faster)
  • Pitch: Adjustable in the range of -0.15 to 0.15 (higher values make the voice higher)
  • Intonation: Adjustable in the range of 0.0 to 2.0 (higher values strengthen intonation)

Koeiromap ​

bash
# API Key
NEXT_PUBLIC_KOEIROMAP_KEY=

Koeiromap is a voice synthesis engine for Japanese with rich emotional expression. It has now been renamed to Koemotion.

API Key ​

Set the API key to use the Koeiromap API. API keys can be obtained from Koemotion.

Presets and Adjustments ​

  • Presets: You can select from presets such as "Cute", "Energetic", "Cool", and "Deep"
  • X-axis: Adjust voice quality in the range of -10 to 10
  • Y-axis: Adjust voice quality in the range of -10 to 10

Google Text-to-Speech ​

bash
# Path to JSON file for authentication
GOOGLE_APPLICATION_CREDENTIALS="./credentials.json"
# API Key
GOOGLE_TTS_KEY=""
# Language/Model Settings
NEXT_PUBLIC_GOOGLE_TTS_TYPE=

Google Cloud Text-to-Speech is a voice synthesis service supporting multiple languages.

Settings ​

  • Language Selection: Set the language/voice model to use
  • Authentication: Requires an API key or authentication JSON file (credentials.json)

For detailed voice models, refer to the Google Cloud Official Documentation.

ElevenLabs ​

bash
# API Key
ELEVENLABS_API_KEY=""
# Voice ID
ELEVENLABS_VOICE_ID=""

ElevenLabs is a high-quality voice synthesis service supporting multiple languages.

API Key ​

Set the API key to use the ElevenLabs API.

Voice ID ​

Set the ID of the voice to use (can be checked from the ElevenLabs API)

OpenAI TTS ​

bash
# API Key
OPENAI_TTS_KEY=""
# Voice Type
NEXT_PUBLIC_OPENAI_TTS_VOICE=shimmer
# Model
NEXT_PUBLIC_OPENAI_TTS_MODEL=tts-1
# Speed
NEXT_PUBLIC_OPENAI_TTS_SPEED=1.0

A multilingual voice synthesis service provided by OpenAI.

API Key ​

Set the API key to use the OpenAI API.

Voice Parameter Adjustment ​

  • Voice Type: Select from alloy, echo, fable, onyx, nova, shimmer
  • Model: Select from tts-1 (standard) or tts-1-hd (high quality)
  • Speed: Adjustable in the range of 0.25 to 4.0

Azure OpenAPI TTS ​

bash
# API Key
AZURE_TTS_KEY=""
# Endpoint
AZURE_TTS_ENDPOINT=""
# Voice Type
NEXT_PUBLIC_OPENAI_TTS_VOICE=shimmer
# Speed
NEXT_PUBLIC_OPENAI_TTS_SPEED=1.0

A multilingual voice synthesis service provided by Microsoft Azure.

API Key ​

Set the Azure TTS API key.

Endpoint ​

Set the Azure TTS endpoint URL.

Voice Parameter Adjustment ​

  • Voice Type: Select the voice type to use
  • Speed: Adjustable in the range of 0.25 to 4.0