WebAudioKit

A powerful, lightweight JavaScript library for web audio manipulation with comprehensive support for background music, sound effects, and advanced music playback features.

English | 中文

✨ Features

• 🎵 Background Music (BGM) - Seamless looping background audio with fade effects
• 🔊 Sound Effects (SFX) - Overlapping sound effects with instance management
• 🎶 Music Player - Full-featured player with playlist, lyrics, and multiple play modes
• 📱 Mobile Optimized - Handles page visibility changes and mobile audio constraints
• 🎚️ Advanced Controls - Volume, playback rate, fade in/out, and more
• 📝 Lyrics Support - LRC format parsing with real-time synchronization
• 🔄 Play Modes - Sequential, loop, shuffle, and single repeat modes
• 🚀 Performance - Lazy loading, preloading, and efficient resource management
• 📦 TypeScript - Full TypeScript support with comprehensive type definitions
• 🌐 Universal - Works in all modern browsers with Web Audio API support

📦 Installation

# npm
npm install webaudiokit

# yarn
yarn add webaudiokit

# pnpm
pnpm add webaudiokit

CDN Usage

<!-- ES Module -->
<script type="module">
  import { BGM, SFX, MusicPlayer } from 'https://unpkg.com/webaudiokit@latest/dist/index.js';
</script>

<!-- UMD (Global) -->
<script src="https://unpkg.com/webaudiokit@latest/dist/index.global.js"></script>
<script>
  const { BGM, SFX, MusicPlayer } = WebAudioKit;
</script>

🚀 Quick Start

Background Music (BGM)

Perfect for ambient music, game soundtracks, and atmospheric audio:

import { BGM } from 'webaudiokit';

const bgm = new BGM({
  volume: 0.7,
  loop: true,
  fadeIn: 1000,  // 1 second fade in
  fadeOut: 800,  // 0.8 second fade out
  stopOnHidden: true  // Auto-pause when tab is hidden
});

// Load and play background music
await bgm.load('ambient', 'music/ambient.mp3');
await bgm.load('battle', 'music/battle.mp3');

// Play with smooth transition
await bgm.play('ambient');

// Switch to different track with fade effect
await bgm.play('battle');

Sound Effects (SFX)

Ideal for UI sounds, game effects, and overlapping audio:

import { SFX } from 'webaudiokit';

const sfx = new SFX({
  volume: 0.8,
  stopOnHidden: false
});

// Load sound effects
await sfx.load('click', 'sounds/click.wav');
await sfx.load('explosion', 'sounds/explosion.mp3');

// Play effects (can overlap)
await sfx.play('click');
await sfx.play('click'); // Plays simultaneously with first
await sfx.play('explosion', { volume: 0.5 }); // Custom volume

// Stop all instances of a specific sound
sfx.stop('click');

// Stop all active sound effects
sfx.stopAll();

Music Player

Complete music player with playlist management and advanced features:

import { MusicPlayer, Music, PlayMode } from 'webaudiokit';

const player = new MusicPlayer({
  volume: 0.8,
  mode: PlayMode.SHUFFLE,
  fadeIn: 500,
  fadeOut: 500,
  stopOnHidden: false
});

// Create music tracks
const song1 = new Music('songs/song1.mp3', {
  title: 'Awesome Song',
  artist: 'Great Artist',
  album: 'Best Album',
  cover: 'covers/song1.jpg'
});

const song2 = new Music('songs/song2.mp3', {
  title: 'Another Hit',
  artist: 'Cool Band',
  album: 'New Release',
  cover: 'covers/song2.jpg'
}, 'lyrics/song2.lrc'); // LRC lyrics file

// Add to playlist
player.add(song1);
player.add(song2);

// Or add from Meting API data
await player.addFromMeting(metingApiResponse);

// Playback controls
await player.play();        // Play current track
await player.play(0);       // Play specific track by index
await player.playNext();    // Next track
await player.playPrev();    // Previous track
player.pause();
player.stop();

// Player state
console.log(player.state);        // 'playing', 'paused', 'stopped', etc.
console.log(player.currentTime);  // Current playback position
console.log(player.duration);     // Track duration
console.log(player.progress);     // Playback progress (0-1)

// Event handling
player.on('play', () => console.log('Started playing'));
player.on('pause', () => console.log('Paused'));
player.on('musicchange', (music) => console.log('Now playing:', music.meta.title));
player.on('lyricchange', (lyric) => console.log('Lyric:', lyric?.text));

🎯 Core Classes

BGM (Background Music)

• Purpose: Single-track background audio with smooth transitions
• Features: Fade in/out, looping, volume control, page visibility handling
• Use Cases: Game music, ambient sounds, website background audio

SFX (Sound Effects)

• Purpose: Short, overlapping sound effects
• Features: Multiple simultaneous playback, instance management, custom volume per play
• Use Cases: UI feedback, game effects, notification sounds

Music

• Purpose: Individual music track with metadata
• Features: Metadata support, lyrics parsing, lazy loading
• Use Cases: Music library items, playlist entries

MusicPlayer

• Purpose: Complete music player with playlist management
• Features: Multiple play modes, event system, progress tracking, lyrics sync
• Use Cases: Music applications, audio players, streaming interfaces

📖 Documentation

• API Reference - Complete API documentation with all methods and options
• Usage Guide - Detailed examples and best practices
• 中文文档 - Complete Chinese documentation

🌐 Browser Support

WebAudioKit works in all modern browsers with Web Audio API support:

Browser	Version
Chrome	14+
Firefox	25+
Safari	6+
Edge	12+

🤝 Contributing

Contributions are welcome! Please read our Contributing Guide for details.

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

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🔗 Links

• GitHub Repository - Source code and development
• Documentation Site - Live documentation and examples
• npm Package - Package registry
• Report Issues - Bug reports and feature requests

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