Karaoke Lyrics Processor 🎶 ✍️

Karaoke Lyrics Processor is a tool to prepare song lyrics for karaoke video production.

It processes lyrics by intelligently splitting long lines, handling parentheses, cleaning punctuation, and ensuring that each line fits within a specified maximum length. This tool is especially useful for creating karaoke tracks where timing and line length are crucial for readability.

✨ Features

Core Processing

• Smart Line Splitting: Automatically splits long lines using intelligent algorithms that prioritize commas, "and" conjunctions, and natural word boundaries
• Parentheses Handling: Properly processes lines containing parentheses, maintaining lyrical flow and handling nested parentheses
• Punctuation Cleanup: Removes unnecessary spaces before punctuation marks and fixes comma placement
• Unicode Support: Handles international characters and special Unicode spaces correctly
• Safety Mechanisms: Built-in infinite loop prevention and iteration limits for robust processing

File Format Support

• Multiple Input Formats: Supports TXT, DOCX, DOC, and RTF files
• Encoding Handling: Properly handles UTF-8 and various text encodings
• Fallback Processing: Uses multiple libraries (docx2txt, textract) for maximum compatibility

User Experience

• Clipboard Integration: Automatically copies processed lyrics to clipboard for easy pasting
• Flexible Output: Customizable output filenames and automatic naming conventions
• Debug Mode: Comprehensive logging for troubleshooting and fine-tuning
• Command Line Interface: Full-featured CLI with helpful options and error handling

Quality & Reliability

• 98% Test Coverage: Comprehensive test suite with 88 tests covering all functionality
• Edge Case Handling: Robust handling of empty files, very long words, malformed input, and unusual formatting
• Performance Tested: Memory efficient processing with performance safeguards
• Error Recovery: Graceful error handling with informative messages

🚀 Installation

To install the Karaoke Lyrics Processor, ensure you have Python 3.9 or newer in your environment.

This package is available on PyPI and can be installed using pip:

pip install karaoke-lyrics-processor

📋 Usage

Command Line Interface

Process a lyrics file with default settings:

karaoke-lyrics-processor path/to/your/lyrics.txt

Output: Creates path/to/your/lyrics (Lyrics Processed).txt with processed lyrics.

Advanced Usage Examples

# Custom output file
karaoke-lyrics-processor -o my_processed_lyrics.txt song.txt

# Custom line length (default is 36 characters)
karaoke-lyrics-processor -l 50 song.txt

# Debug mode for detailed logging
karaoke-lyrics-processor -d song.txt

# Combine all options
karaoke-lyrics-processor -d -o output.txt -l 40 input.docx

Supported Input Formats

• .txt - Plain text files (UTF-8 recommended)
• .docx - Microsoft Word documents
• .doc - Legacy Microsoft Word documents
• .rtf - Rich Text Format files

Command Line Options

usage: karaoke-lyrics-processor [-h] [-v] [-d] [-o OUTPUT] [-l LINE_LENGTH] filename

Process song lyrics to prepare them for karaoke video production

positional arguments:
  filename                                   Path to the lyrics file to process

options:
  -h, --help                                 Show help message and exit
  -v, --version                              Show program's version number and exit
  -d, --debug                                Enable debug mode with detailed logging
  -o OUTPUT, --output OUTPUT                 Specify the output filename
  -l LINE_LENGTH, --line_length LINE_LENGTH  Maximum line length (default: 36)

🔧 Processing Features

Intelligent Line Splitting

The processor uses sophisticated algorithms to find optimal split points:

1. Comma Priority: Splits at commas near the middle of long lines
2. Conjunction Splitting: Uses "and" as split points when appropriate
3. Word Boundaries: Respects word boundaries and avoids breaking words
4. Parentheses Awareness: Handles parenthetical content intelligently
5. Fallback Mechanisms: Forces splits when no natural break points exist

Text Cleaning

• Removes non-printable characters while preserving essential formatting
• Normalizes various Unicode space characters to regular spaces
• Consolidates multiple consecutive newlines
• Strips unnecessary whitespace from line beginnings and ends

Error Handling

• Graceful handling of unsupported file formats
• Recovery from encoding issues
• Protection against infinite processing loops
• Clear error messages for troubleshooting

🧪 Development & Testing

This package maintains high quality standards with comprehensive testing:

• 98% Test Coverage across all modules
• 88 Total Tests including unit, integration, and CLI tests
• Edge Case Testing for robustness
• Performance Testing to prevent regressions
• Continuous Integration with automated testing

Running Tests

# Install development dependencies
pip install pytest pytest-cov

# Run the full test suite
pytest --cov=karaoke_lyrics_processor --cov-report=html

# Run with verbose output
pytest -v

# Generate coverage report
pytest --cov-report=term-missing

🤝 Contributing

Contributions are very much welcome! This project follows best practices for maintainability:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Write tests for your changes
4. Ensure tests pass and maintain >90% coverage
5. Commit your changes (git commit -m 'Add amazing feature')
6. Push to the branch (git push origin feature/amazing-feature)
7. Open a Pull Request

Development Setup

# Clone the repository
git clone https://github.com/nomadkaraoke/karaoke-lyrics-processor.git
cd karaoke-lyrics-processor

# Install development dependencies
pip install -e ".[dev]"

# Run tests
python run_tests.py

• This project is 100% open-source and free for anyone to use and modify as they wish
• All contributions are tested automatically via CI/CD
• Code quality is maintained through comprehensive testing and reviews

📄 License

This project is licensed under the MIT License.

💌 Contact

For questions, feature requests, or bug reports:

• Issues: GitHub Issues
• Email: Andrew Beveridge (@beveradb)
• Discussions: GitHub Discussions

Built with ❤️ for the karaoke community