Notice that your app produces the following warnings right now:
AudioContext.js:13 The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. Política de reprodução automática no Chrome | Blog | Chrome for Developers
The app has to ensure to only decode and play audio files when a user interaction has happened. You need a similar logic like the web audio examples e.g. webaudio_visualizer.
You normally solve this issue by having an additional screen with some sort of start of play button. This additional screen can also be used to tell the user to turn on audio or use headphones for best experience.