adding audio / music then saving file as pdf

I produce a monthly magazine using pages. Once done I save the file as a PDF.

I woud like to add a audio file or music file to pages then save it as a PDF and send it out.

Is there a way of doing this?

I know you can drag and drop a audio file onto the page but it disappears when you save it as a PDF and I do need the PDF format.

Any help?

Thanks!