> ## Documentation Index > Fetch the complete documentation index at: https://docs.voxnexus.ai/llms.txt > Use this file to discover all available pages before exploring further. # Features > Comprehensive overview of VoxNexus platform features ## Overview VoxNexus provides a comprehensive suite of voice services designed to meet the diverse needs of modern applications. Our platform combines cutting-edge AI technology with developer-friendly APIs to deliver exceptional voice experiences. ## Text-to-Speech (TTS) ### Natural Voice Synthesis Transform written text into natural-sounding speech with our advanced AI voice models. Our TTS engine supports: * **Multiple Languages**: Support for dozens of languages including English, Chinese, Spanish, French, German, Japanese, and more * **Voice Variety**: Choose from hundreds of voices with different genders, ages, and styles * **Emotional Expression**: Control voice tone, speed, pitch, and volume for expressive narration * **SSML Support**: Use Speech Synthesis Markup Language for advanced control over pronunciation and prosody ### Audio Formats Generate audio in multiple formats to suit your needs: * **MP3**: Compressed format ideal for web and mobile applications * **WAV**: Uncompressed format for high-quality audio production * **OGG**: Open-source compressed format * **PCM**: Raw audio data for real-time processing * **WebM**: Web-optimized format for browser playback ### Customization Options Fine-tune voice output with extensive parameters: * **Speed Control**: Adjust speech rate from 0.5x to 2.0x * **Pitch Adjustment**: Modify pitch in semitones (-12 to +12) * **Volume Control**: Set volume multiplier (0.0 to 1.0) * **Sample Rates**: Choose from 8kHz to 48kHz based on quality requirements * **Bit Rates**: Configure compression quality for audio formats ## Speech-to-Text (STT) ### Accurate Transcription Convert audio to text with high accuracy using our advanced speech recognition engine: * **Multi-Language Support**: Automatic language detection or explicit language specification * **High Accuracy**: State-of-the-art recognition models trained on diverse datasets * **Real-time Processing**: Low-latency recognition for live applications * **Noise Robustness**: Handle various audio qualities and background noise ### Advanced Features Enhance your transcription with powerful features: #### Timestamps Get word-level timing information for precise synchronization: ```json theme={null} { "words": [ { "word": "hello", "offset": 0, "duration": 500 } ] } ``` #### Confidence Scores Understand recognition certainty with confidence scores: * Overall confidence for the entire transcription * Per-word confidence scores when timestamps are enabled * Helps identify uncertain segments for review #### Speaker Diarization Identify different speakers in multi-speaker audio: ```json theme={null} { "speakers": [ { "speaker_id": "speaker_1", "text": "Hello, how are you?", "offset": 0, "duration": 2000 } ] } ``` #### Custom Vocabulary Improve recognition accuracy for domain-specific terms: * Add custom keywords for better detection * Define custom vocabulary for specialized terminology * Enhance accuracy for technical or industry-specific content ## API Architecture ### REST API Standard HTTP-based API for synchronous and streaming requests: * **Synchronous Requests**: Get complete results in a single response * **Streaming Support**: Receive audio data in chunks for reduced latency * **Standard HTTP**: Works with any HTTP client or library * **RESTful Design**: Intuitive endpoint structure ### WebSocket API Real-time bidirectional communication for interactive applications: * **Low Latency**: Instant message exchange for real-time experiences * **Persistent Connection**: Maintain connection for multiple operations * **Bidirectional**: Send and receive data simultaneously * **Event-Driven**: Handle messages asynchronously ## Voice Library ### Diverse Voice Options Access a growing library of high-quality voices: * **Languages**: Support for 50+ languages and locales * **Genders**: Male, female, and neutral voices * **Age Groups**: Child, young, adult, and senior voices * **Styles**: Various speaking styles (cheerful, professional, casual, etc.) * **Accents**: Regional accents and dialects ### Voice Discovery Easily find the perfect voice for your needs: * **Search by Keyword**: Search voices by name or description * **Filter by Attributes**: Filter by language, gender, age, or style * **Preview Samples**: Listen to voice samples before integration * **Voice Details**: Access comprehensive voice information and configuration options ## Performance & Reliability ### Scalability Built to handle any scale: * **High Throughput**: Process thousands of requests per second * **Auto-Scaling**: Infrastructure scales automatically with demand * **Global CDN**: Fast delivery worldwide * **Load Balancing**: Distribute load across multiple servers ### Reliability Enterprise-grade reliability: * **99.9% Uptime SLA**: High availability guarantee * **Redundancy**: Multiple data centers for failover * **Monitoring**: 24/7 system monitoring and alerting * **Backup Systems**: Automatic failover and recovery ### Performance Optimization Optimized for speed and efficiency: * **Caching**: Intelligent caching for frequently used voices * **Compression**: Efficient audio compression algorithms * **Streaming**: Chunked transfer for faster response times * **Connection Pooling**: Optimized connection management ## Security & Privacy ### Authentication Secure API access: * **API Keys**: Token-based authentication * **Bearer Tokens**: Standard HTTP Bearer token authentication * **Key Management**: Secure key storage and rotation * **Access Control**: Fine-grained permission management ### Data Privacy Your data is protected: * **Encryption**: All data encrypted in transit (TLS/SSL) * **No Storage**: Audio data not stored after processing * **GDPR Compliant**: Meets data protection regulations * **Privacy Policy**: Clear privacy commitments ### Rate Limiting Protect your account and our infrastructure: * **Rate Limits**: Configurable request rate limits * **Quota Management**: Track and manage usage quotas * **Fair Usage**: Ensure fair resource distribution * **Monitoring**: Real-time usage monitoring ## Developer Experience ### Comprehensive Documentation Everything you need to succeed: * **API Reference**: Complete endpoint documentation * **Code Examples**: Working examples in multiple languages * **Guides**: Step-by-step tutorials and best practices * **Interactive Playground**: Test APIs directly in your browser ### SDKs & Libraries Official and community SDKs: * **JavaScript/TypeScript**: Browser and Node.js support * **Python**: Full-featured Python SDK * **REST Clients**: Works with any HTTP client * **WebSocket Libraries**: Compatible with standard WebSocket libraries ### Support Get help when you need it: * **Email Support**: Direct support via email * **Documentation**: Comprehensive self-service resources * **Community**: Active developer community * **Status Page**: Real-time service status updates ## Integration Examples ### Web Applications Integrate voice capabilities into web apps: ```javascript theme={null} // Simple TTS integration const response = await fetch('https://api.voxnexus.ai/v1/tts', { method: 'POST', headers: { 'Authorization': 'Bearer YOUR_API_KEY', 'Content-Type': 'application/json' }, body: JSON.stringify({ text: 'Hello, world!', voice_id: 'vn-xiaoxiao' }) }); const audioBlob = await response.blob(); const audioUrl = URL.createObjectURL(audioBlob); ``` ### Mobile Applications Add voice features to mobile apps: ```swift theme={null} // iOS example let url = URL(string: "https://api.voxnexus.ai/v1/tts")! var request = URLRequest(url: url) request.httpMethod = "POST" request.setValue("Bearer YOUR_API_KEY", forHTTPHeaderField: "Authorization") request.setValue("application/json", forHTTPHeaderField: "Content-Type") let body = ["text": "Hello", "voice_id": "vn-xiaoxiao"] request.httpBody = try? JSONSerialization.data(withJSONObject: body) ``` ### Server-Side Processing Process audio on your servers: ```python theme={null} # Python example import requests response = requests.post( 'https://api.voxnexus.ai/v1/stt', headers={ 'Authorization': 'Bearer YOUR_API_KEY', 'Content-Type': 'audio/wav' }, params={ 'sample_rate': 16000, 'language': 'en-US' }, data=audio_file ) transcription = response.json() print(transcription['text']) ``` ## Next Steps Ready to get started? Check out our guides: Get up and running in minutes Explore our API documentation