---
title: SYNTHIA
emoji: 🎹
colorFrom: purple
colorTo: blue
sdk: gradio
sdk_version: 5.49.1
app_file: app.py
pinned: false
short_description: Browser-based MIDI keyboard with recording and synthesis
---

# SYNTHIA

A minimal, responsive browser-based MIDI keyboard. Play live, record performances, and export as MIDI files. 🎹

This build includes a **Godzilla** engine that can continue a short phrase using the
Godzilla Piano Transformer.


## 🗂️ Project Structure

```
.
├── app.py                  # Gradio server & API endpoints
├── config.py               # Centralized configuration
├── engines.py              # MIDI processing engines
├── midi_model.py           # Godzilla model integration
├── midi.py                 # MIDI file utilities
├── keyboard.html           # HTML structure
├── static/
│   ├── keyboard.js         # Client-side audio (Tone.js)
│   └── styles.css          # Styling & animations
├── requirements.txt        # Python dependencies
└── README.md               # This file
```

## 🚀 Quick Start

```bash
# Install dependencies
uv pip install -r requirements.txt

# Run the app
uv run python app.py
```

Open **http://127.0.0.1:7861**

## 🎹 Godzilla Engine

Select **Godzilla** in the engine dropdown to generate a short continuation from your
recorded phrase. The model is downloaded on first use and cached locally.

Note: the engine filters generated notes to your on-screen keyboard range.

## 🌐 Deploy to Hugging Face Spaces

```bash
git remote add hf git@hf.co:spaces/YOUR_USERNAME/synthia
git push hf main
```

Current configuration runs Godzilla generation on CPU for reliability.

## 🔧 Technology

- **Frontend**: Tone.js v6+ (Web Audio API)
- **Backend**: Gradio 5.x + Python 3.10+
- **MIDI**: mido library
- **Model**: Godzilla Piano Transformer (via Hugging Face)

## 📝 License

Open source - free to use and modify.