TMS Blog: Web Audio API Part 1/2. In this post, we're going to have a quick look at the Web Audio API, the current standard for everything audio-related in modern web browsers. We'll create a music player-type app that can be used to playback standard audio files like MP3 or WAV. And while the Web Audio API itself doesn't require a JS library (it is included in modern browsers already), a few additional JS libraries will be playing a supporting role. And just for fun, we'll use our newly minted D3 talents to create a basic visualizer as well.