<bgsound>: The Background Sound element
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
The <bgsound> HTML element is deprecated. It sets up a sound file to play in the background while the page is used; use <audio> instead.
Historically, the <embed> element could be used with audio player plug-ins to play audio in the background in most browsers. However, even this is no longer appropriate, and you should use <audio> instead, since it's more capable, more compatible, and doesn't require plug-ins.
