We use HTML5 compliant code for embedding audio and video.
Authors wishing to embed audio (only) in their articles should supply us with two file formats (ogg and mp3) and should include a transcript of the content of the file in HTML or pdf.
(The embed tag is for Internet Explorer users; so far, IE doesn't support the audio tag.)
In order to make these formats, we support the use of Miro Video Converter, an open source free video converter to convert a QuickTime movie (.mov) to mp3. You can then convert that mp3 file to ogg using Switch.