Original from Toptal "Web Audio API can be quite hard to use for some purposes, as it is still under development, but a number of JavaScript libraries already exist to make things easier. In this case I am going to show you how to get started with the Web Audio API using a library called Tone.js. With this, you will be able to cover most of your browser sound needs from only learning the basics."
See the article in the toptal blog: www.toptal.com/web/web-audio-api-tutorial