Not sure where to start?
Start with a free analysis of your website's accessibility.GET STARTED
If there is audio on a web page that plays automatically for more than three seconds, you must provide the user with a mechanism to control the volume of the audio, to pause it or turn it off. This is especially important for users of screen readers, since the sound of the audio file can drown out the sound of the screen reader. Be aware that having a sound play automatically on page load may interfere with a screen reader user's ability to find the sound's controls, so having a sound play automatically, rather than at the user's command is discouraged.
1.4.2 Audio Control: If any audio on a Web page plays automatically for more than 3 seconds, either a mechanism is available to pause or stop the audio, or a mechanism is available to control audio volume independently from the overall system volume level.
Note: Since any content that does not meet this success criterion can interfere with a user's ability to use the whole page, all content on the Web page (whether or not it is used to meet other success criteria) must meet this success criterion. See Conformance Requirement 5: Non-Interference.