The <audio> element is used to embed audio content in an HTML document without requiring any additional plug-in like Flash player.
Currently there are three supported file format for HTML 5 audio tag.
The <audio> tag contains one or more <source> tags with different audio sources. The browser will choose the first source it supports.
The text between the <audio> and </audio> tags will only be displayed in browsers that do not support the <audio> element.
Read more here: Source link