Click the Audio tab.
Click the 
(Delete) button that is in the row you want to delete.
In the Audio tab, each file has one row. The File Name column shows you the name of the audio file for that row.
Do these steps to delete an audio file.
Click the Audio tab.
Click the (Delete) button that is in the row you want to delete.
The Confirmation dialog box appears. It informs which file will be deleted.
If you are sure, click Yes.
You can also delete an audio file from the Versions dialog box.