🚀 Try this Example
View the complete source code on GitHub.Or clone this repository:
Before you run, make sure you have:
- Authenticated with fal:
fal auth login
- Activated your virtual environment (recommended):
python -m venv venv && source venv/bin/activate
(macOS/Linux) orvenv\Scripts\activate
(Windows)
Key Features
- Multi-Language Support: American English, British English, Japanese with native voices
- CPU-Efficient Deployment: Lightweight 82M parameter model runs efficiently on CPU
- Multiple Endpoints: Language-specific endpoints with shared generation logic
- Voice Variety: Multiple voice options for each supported language
- Audio Streaming: Generator-based audio processing for memory efficiency
- Character-Based Billing: Usage-based pricing tied to text length
- Advanced Validation: Custom error handling with user-friendly messages
- Audio File Management: Temporary file handling and CDN integration
When to Use CPU Deployment
CPU deployment is ideal when:- Models are lightweight (< 100M parameters)
- Inference is fast enough on CPU
- Cost optimization is important
- GPU resources are not required
- Multiple concurrent requests can share CPU resources efficiently
Project Setup
Language-Specific Input Models
Define input models for each supported language with appropriate voice options:Language-Specific Output Models
Application Configuration for CPU Deployment
Shared Generation Logic
Create a reusable generation method that handles all languages:Multiple Endpoint Definitions
Define language-specific endpoints using the shared generation logic:Key Concepts and Best Practices
CPU-Efficient Deployment
Why CPU for TTS:- Kokoro is only 82M parameters - runs efficiently on CPU
- Lower cost compared to GPU instances
- Sufficient performance for real-time TTS
- Better resource utilization for multiple concurrent requests
Audio Streaming and Memory Management
Generator-based processing:Character-Based Billing
Audio File Handling
Multi-Language Architecture
Pipeline initialization:Advanced Features
Custom Validation
Backwards Compatibility
Flexible Text Processing
Deployment and Usage
Running the Service
Making Requests
American English:Use Cases
- Content Creation: Generate voiceovers for videos and podcasts
- Accessibility: Convert text content to audio for visually impaired users
- E-Learning: Create educational content with natural-sounding narration
- Customer Service: Generate dynamic audio responses for chatbots
- Multilingual Applications: Support global audiences with native-sounding voices
- Book Reading: Convert written content to audiobooks
Performance Optimizations
Memory Efficiency
Cost Optimization
Key Takeaways
- CPU deployment is ideal for lightweight models like Kokoro (82M parameters)
- Multi-language support requires separate pipelines and voice models
- Character-based billing aligns costs with resource usage
- Audio streaming handles long texts efficiently without memory issues
- Temporary file handling with CDN upload provides fast, reliable audio delivery
- Multiple endpoints with shared logic offer flexibility while maintaining DRY principles
- Custom validation provides better user experience with clear error messages