Features

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Overview

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Text-to-Speech (TTS)

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Natural Voice Synthesis

• 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

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Audio Formats

• 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

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Customization Options

• 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

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Speech-to-Text (STT)

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Accurate Transcription

• 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

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Advanced Features

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Timestamps

{
  "words": [
    {
      "word": "hello",
      "start_time_ms": 0,
      "end_time_ms": 500,
      "confidence": 0.98
    }
  ]
}

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Confidence Scores

• Overall confidence for the entire transcription
• Per-word confidence scores when timestamps are enabled
• Helps identify uncertain segments for review

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Speaker Diarization

{
  "speakers": [
    {
      "speaker_id": "speaker_1",
      "text": "Hello, how are you?",
      "start_time_ms": 0,
      "end_time_ms": 2000
    }
  ]
}

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Custom Vocabulary

• Add custom keywords for better detection
• Define custom vocabulary for specialized terminology
• Enhance accuracy for technical or industry-specific content

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API Architecture

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REST API

• 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

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WebSocket API

• 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

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Voice Library

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Diverse Voice Options

• 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

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Voice Discovery

• 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

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Performance & Reliability

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Scalability

• 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

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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

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Performance Optimization

• Caching: Intelligent caching for frequently used voices
• Compression: Efficient audio compression algorithms
• Streaming: Chunked transfer for faster response times
• Connection Pooling: Optimized connection management

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Security & Privacy

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Authentication

• 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

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Data Privacy

• 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

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Rate Limiting

• Rate Limits: Configurable request rate limits
• Quota Management: Track and manage usage quotas
• Fair Usage: Ensure fair resource distribution
• Monitoring: Real-time usage monitoring

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Developer Experience

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Comprehensive Documentation

• 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

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SDKs & Libraries

• 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

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Support

• Email Support: Direct support via email
• Documentation: Comprehensive self-service resources
• Community: Active developer community
• Status Page: Real-time service status updates

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Integration Examples

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Web Applications

// 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: 'vl-xiaoxiao'
  })
});

const audioBlob = await response.blob();
const audioUrl = URL.createObjectURL(audioBlob);

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Mobile Applications

// 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": "vl-xiaoxiao"]
request.httpBody = try? JSONSerialization.data(withJSONObject: body)

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Server-Side Processing

# 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'])

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Next Steps