Workaround:

• When editing: "view -> source code"
• Change "<audio controls="controls"> ... </audio>" by "<video controls="controls"> ... </video>"

Audio box looks like a video object but still usable and context menu looks correct (you can find "Save Audio As..." option)

1. Edit a text box (forum message, activity description,... whatever) with any Atto or Tiny MCE editor.
2. Press "Record Audio" button.
3. Say something.
4. Save audio track.
5. Right click on the audio track: you can see player's context menu.
6. Save changes.
7. Right click on the audio track again: It's shown page context menu, not player's menu.

If you repeat the steps inserting a video, it's shown the players context menu, always.