All clips are private by default and cannot be seen or accessed by the public. You must publish a clip to make it accessible to others. There are several visibility options:
Public: The clip is accessed with an Omny.fm link (will appear in the show listing and will be indexed by search engines), can be embedded, can be downloaded directly, and will appear in RSS feeds if added to a playlist.
Private: The clip is not publicly visible or accessible.
Unlisted: The clip is not publicly viewable (and should not indexed by search engines), but can be shared via the Omny.fm link, embedded in a website, or linked directly to the MP3.
Note: If you add an unlisted clip to a playlist, it will become visible in the playlist, for more on visibility please see this guide.