> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.vapi.ai/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.vapi.ai/_mcp/server.

# Voice Enhancements & Minimax Improvements

1. **Minimax Voice Language Support**: Enhance multilingual conversations with [`MinimaxVoice.languageBoost`](https://api.vapi.ai/api#:~:text=MinimaxVoice.languageBoost). Support for 40+ languages including:
   * `Chinese` and `Chinese,Yue` for Mandarin and Cantonese
   * `English`, `Spanish`, `French`, `German`, `Japanese`, `Korean`
   * Regional variants and specialized languages like `Arabic`, `Hindi`, `Thai`
   * `auto` mode for automatic language detection

2. **Text Normalization**: Improve number reading and formatting with [`MinimaxVoice.textNormalizationEnabled`](https://api.vapi.ai/api#:~:text=MinimaxVoice.textNormalizationEnabled). When enabled, spoken numbers, dates, and formatted text are properly pronounced for natural-sounding conversations.

3. **Enhanced Voice Caching**: Voice responses are now cached by default with [`MinimaxVoice.cachingEnabled`](https://api.vapi.ai/api#:~:text=MinimaxVoice.cachingEnabled) set to `true`, reducing latency for repeated phrases and improving overall conversation performance.

4. **Fallback Voice Configuration**: Ensure conversation continuity with [`FallbackMinimaxVoice`](https://api.vapi.ai/api#:~:text=FallbackMinimaxVoice) featuring the same language boost and text normalization capabilities as the primary voice configuration.

5. **Speaker Labeling**: Track multiple speakers in conversations with [`BotMessage.speakerLabel`](https://api.vapi.ai/api#:~:text=BotMessage.speakerLabel), providing stable speaker identification (e.g., "Speaker 1") for better conversation analysis and diarization.

6. **Voice Region Support**: Choose optimal performance regions with Minimax's `worldwide` (default) or `china` regional settings for better latency and compliance with local regulations.

> **Info**
>
> Language boost settings help the text-to-speech model better understand context and pronunciation for specific languages, resulting in more natural and accurate voice synthesis.

## Voice Quality Features

#### Multilingual Support

Support for 40+ languages with automatic detection and language-specific optimizations for natural pronunciation.

#### Smart Text Processing

Intelligent normalization of numbers, dates, and formatted text for natural-sounding speech synthesis.

#### Performance Optimization

Voice caching reduces latency for common phrases, while regional settings optimize for local performance.

#### Conversation Tracking

Speaker labeling and diarization support for multi-participant conversation analysis and management.