Audio Player is a lightweight & customizable audio player that supports touch events.

Audio Player weighs a mere 4 kilobytes but has some awesome features:

• It’s responsive;
• Degrades gracefully;
• Doesn’t use images or flash.

The plugin tries to use native functionality where it can, but is not directly native.

All in all, Audio Player looks like a basic and, above all, functional audio player.

jWebAudio is a nice jQuery/standalone library for controlling sound effects.

It offers a lightweight (9kb minified) and easy to use solution for most tasks required for video game development.

Some notable features: fade in/out; loop; multishot for short sounds; and so on.

It comes in standalone and jQuery-powered versions. The library also allows seeking, controlling the volume, and essentially makes most audio-related tasks easy.

howler.js is a library for working with Google’s new Web Audio API.

The new Web Audio API is easier to use and possesses more features than HTML5′s Audio.

However, most browsers don’t support the former so a library like this needs a fallback — and it does have one.

Some of the most impressive features of this library include:

• Multiple file format support;
• Automatic caching for both HTML5 Audio and then new standard;
• Playback of multiple sounds simultaneously;
• Lightweight at 5 kilobytes.

Audio5js is a JS library that acts like an extra compatibility layer for HTML5′s Audio API.

The library supports multiple codecs and falls back to Flash in case of emergency.

What’s perhaps the best thing about Audio5js is that it supports multiple codecs (you know how it is with browser support for audio playback…). The lightweight library, of course, also sports a simple API.

teoria.js is a comprehensive framework for Jazz & Classical music theory. 

teoria.js strives to be a framework that provides an intuitive interface for music software, such as sheet readers & writers, as well as MIDI players and so on.

The framework ‘understands’ notes, chords (even obscure ones, mind you), scales, modes and intervals.

KievII is a JS GUI/DSP audio library for building audio web and mobile applications.

In addition to providing audio functions, KievII aspires to give the developers tools for building their own synths, music apps and sequencers.

The examples are impressive. In particular, the Morning Star synth/sequencer is out of this world in terms of average complexity of HTML5 apps. Who knows, maybe we’ll get an Ableton browser versions sometime in the future.