Text to MIDI Generator

A Streamlit-based web application that converts Japanese text (romaji/hiragana/katakana) into MIDI files with customizable parameters. Perfect for UTAU/DIFFSINGER and other voice synthesis development workflows.

https://text2midi.streamlit.app/ Live demo

Features

• Convert text to MIDI with customizable parameters
• Support for Japanese text input (romaji/hiragana/katakana)
• Special character handling (sokuon っ/ッ and small kana)
• Adjustable BPM and time signature
• Customizable base pitch
• Label file generation for voice synthesis timing
• Real-time label preview
• Automatic silence duration calculation
• Clean and intuitive user interface

Installation

1. Clone the repository:

git clone https://github.com/yotsuuba/text2midi.git
cd text2midi

2. Install the required dependencies:

pip install -r requirements.txt

Dependencies

• streamlit
• pandas
• numpy
• midiutil
• jaconv
• pretty_midi

Usage

1. Start the Streamlit application:

streamlit run app.py

2. Open your web browser and navigate to http://localhost:8501

3. Configure the settings in the sidebar:

   • BPM (1-300)
   • Time Signature
   • Base Pitch (21-108)
   • Label File Generation

4. Enter your text in the main text area

   • Supports hiragana, katakana, or romaji
   • Use empty lines to separate clusters

5. Adjust the Label Silence Duration if needed

6. Click "Generate MIDI" to create your files

Input Format

The application accepts text in the following formats:

• Hiragana: あいうえお
• Katakana: アイウエオ
• Romaji: aiueo

Use empty lines to separate clusters for proper timing:

こんにちは
世界

Output Files

1. MIDI File (.mid):

   • Contains the generated musical notes
   • Uses specified BPM and time signature
   • Each character/syllable becomes a note

2. Label File (.txt) [Optional]:

   • Contains timing information
   • Format: start_time end_time text
   • Useful for voice synthesis timing

Configuration Options

Parameter	Range	Description
BPM	1-300	Tempo in beats per minute
Time Signature	1-16/1-16	Musical time signature
Base Pitch	21-108	MIDI note number (C0-C8)
Label Silence	0.1-max	Silence duration between labels

Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

Credits

Created by H5X2 (2024-2025)

Support

For support, please open an issue in the GitHub repository or contact the maintainers.

Acknowledgments

• Thanks to the Streamlit team for the amazing framework
• All contributors and users of this tool