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Sound Accessibility

A web page with interface sounds effects should not be intrusive to the user. Certain web applications make the user expect sounds effects implicitely, but this is not necessarily the default case. See the UI/UX guidelines where some recommendations are made.

Since Chrome Audio Autoplay Policies block the sound playback on window load until first user interaction, it is not recommended to play sounds on window start time. Only after first user interaction.

By default, howlerjs will try to unlock the browser sound playback on window load. In case audio is locked, this will queue all sound playbacks before it was unlocked and play them when it is unlocked. This behavior is not recommended and it can be disabled:

import howler from 'howler';
howler.autoUnlock = false;

In this case, only sounds after browser audio is unlocked are reproduced. So the sounds can be played normally and they will be reproduced only if allowed without throwing erros if audio playback is locked.

If the application requires to play sounds as normal user experience, it is recommended to "explicitely" request permission from the user, such as showing a start page with a button to request access before accessing to the application.

The sounds tools allow the programmer to define if the sounds are enabled, the sound volume, and the rate of playback. It also allows to set settings by categories of sounds. It is recommended to show the user a settings panel where to configure these behaviors.