I have to create a audio file that I wish to offer to

* listen and
* not to download

any idea how to get it done? Can there be any free joomla extention wordpress plugin for your?

Something where user cannot save the audo using any webbrowser wordpress plugin like DownloadHelper etc.

The simplest way I'm able to think about is by using the JoomlaWorks extension AllVideos. It's support for audio recordings and incredibly easy to setup and employ.