On [Mozilla developper website][1] you can find the following informations :
- MP3 is supported by IE
- OGG is not supported by IE
- WebM is supported by IE with the addition of a plugin
Anyway, you need to know it is a real pain in the *** to make your audio files working on all browsers. First thing to do is link the 3 formats in order to let the browser chose the one it prefers, but even then you will likely encounter many incomprehensible issues due to the high diversity of browsers, versions, etc... [1]: https://developer.mozilla.org/en-US/docs/Web/HTML/Supported_media_formats