# 🎵 Sound Effect Generator

A professional web application for generating custom sound effects using the ElevenLabs API with Microsoft Azure AD authentication.

## Features

### 🔐 Authentication
- **Microsoft Azure AD Integration**: Secure login using Oliver SSO
- **Session Management**: Persistent login sessions with automatic token validation
- **Protected Access**: Main application is hidden until user authenticates

### 🎛️ Sound Generation
- **ElevenLabs API Integration**: Professional-grade AI sound generation
- **Text-to-Sound**: Generate sound effects from text descriptions
- **Duration Control**: Adjustable duration from 0.5 to 22 seconds (or auto)
- **Prompt Influence**: Fine-tune how closely the AI follows your description (0-1 scale)

### 🎨 User Interface
- **Modern Design**: Clean, responsive interface using Montserrat font
- **Dark/Light Mode**: Toggle between themes with persistent preference storage
- **Interactive Sliders**: Real-time value display for duration and prompt influence
- **Mobile Responsive**: Optimized for all device sizes

### 🔧 Technical Features
- **Real-time Audio Playback**: Instant preview of generated sounds
- **Download Functionality**: Save sound effects as MP3 files
- **Automatic Cleanup**: Old files (24+ hours) are automatically deleted
- **Error Handling**: Comprehensive error messages and validation
- **Security Headers**: Protected configuration files and proper MIME types

## Installation

### Prerequisites
- Web server with PHP support
- ElevenLabs API key
- Microsoft Azure AD application configured

### Setup Steps

1. **Clone/Download** the project files to your web server

2. **Configure API Key**:
   ```php
   // Edit config.php
   'elevenlabs_api_key' => 'your-actual-elevenlabs-api-key-here'
   ```

3. **Set Permissions**:
   ```bash
   chmod 755 generated/
   chmod 644 config.php
   ```

4. **Configure Azure AD** (if needed):
   - Update `clientId` and `authority` in `index.php` line 500-501
   - Ensure redirect URI matches your domain

## Configuration

### config.php
```php
return [
    'elevenlabs_api_key' => 'your-api-key-here',
    'max_file_age_hours' => 24,        // Auto-delete files older than this
    'generated_files_dir' => 'generated/'
];
```

### Azure AD Settings
Located in `index.php` around line 498:
```javascript
const msalConfig = {
    auth: {
        clientId: "your-client-id",
        authority: "https://login.microsoftonline.com/your-tenant-id",
        redirectUri: window.location.origin + window.location.pathname
    }
};
```

## Usage

1. **Login**: Use your Oliver SSO credentials to authenticate
2. **Describe Sound**: Enter a text description of the sound effect you want
3. **Adjust Settings**:
   - **Duration**: Use slider (0 = auto, or 0.5-22 seconds)
   - **Prompt Influence**: Control AI creativity (0 = creative, 1 = literal)
4. **Generate**: Click "Generate Sound Effect" button
5. **Play & Download**: Preview the audio and download if satisfied

### Example Prompts
- "Spacious braam suitable for high-impact movie trailer moments"
- "Gentle rain falling on leaves in a forest"
- "Sci-fi laser gun firing with echo"
- "Medieval sword clashing against shield"
- "Mystical wind chimes in ancient temple"

## API Integration

### ElevenLabs Sound Generation API
- **Endpoint**: `POST https://api.elevenlabs.io/v1/sound-generation`
- **Parameters**:
  - `text` (required): Sound description
  - `duration_seconds` (optional): 0.5-22 seconds
  - `prompt_influence` (optional): 0-1 creativity control
- **Output**: MP3 audio file

## File Structure
```
sound-effects/
├── index.php              # Main application
├── config.php             # API configuration
├── .htaccess              # Security & MIME types
├── generated/             # Generated sound files (auto-created)
└── README.md              # This file
```

## Security Features

- **Config Protection**: `.htaccess` prevents direct access to `config.php`
- **File Cleanup**: Automatic deletion of old generated files
- **Input Validation**: Sanitized user inputs and API parameters
- **Session Security**: Secure token management with Azure AD
- **HTTPS Redirect**: Enforced secure connections

## Browser Support

- **Chrome/Edge**: Full support
- **Firefox**: Full support
- **Safari**: Full support (including iOS)
- **Mobile**: Responsive design for all mobile browsers

## Troubleshooting

### Common Issues

**"Please configure your ElevenLabs API key"**
- Edit `config.php` and add your actual API key

**Authentication Issues**
- Check Azure AD configuration
- Verify redirect URI matches your domain
- Clear browser cache and try again

**Sound Generation Fails**
- Verify API key is valid and has credits
- Check internet connection
- Try simpler text descriptions

**File Permission Errors**
- Ensure `generated/` directory exists and is writable
- Check web server file permissions

### Debug Mode
Add error reporting to troubleshoot issues:
```php
// Add to top of index.php for debugging
error_reporting(E_ALL);
ini_set('display_errors', 1);
```

## Development

### Adding Features
- Edit `index.php` for UI/functionality changes
- Modify `config.php` for new settings
- Update `.htaccess` for security rules

### Customization
- **Colors**: Modify CSS variables in the `:root` section
- **Fonts**: Change Google Fonts import and CSS font-family
- **Authentication**: Update Azure AD configuration as needed

## License

This project is for internal use with Oliver Agency's infrastructure and authentication systems.

## Support

For technical issues or questions:
- Email: optical@oliver.agency
- Check ElevenLabs API documentation for sound generation issues
- Verify Azure AD configuration for authentication problems