In Chrome I get an exception >The AudioContext was not allowed to start. It must be resume (or created) after a user gesture on the page. https://goo.gl/7K7WLu

In Chrome I get an exception >The AudioContext was not allowed to start. It must be resume (or created) after a user gesture on the page. https://goo.gl/7K7WLu https://goo.gl/7K7WLu thrown from the call to `new AudioContext()` and results in a page that makes no sound. Changing the sliders after this error has happened (in the hope that it would count as a user gesture) does not seem to do anything.