How can I Extract Audio only from an iMovie project in iOS?

Users at my school want to use the audio from an iMovie project, and there seems to be no convenient way of doing so. Right now they are exporting it and uploading it to a site like Youtube or Vimeo, then using a tool to extract audio from a flash file.

It seems much to extended of a process just to get the audio from a file already in iMovie. I would like to do it right from iMovie or some alternative that can be done without a PC or Mac required.

Thanks for any help.