Audio field already populated when I click NEW

When I create a new sermon file, the audio file is already populated.  How can I remove this so that it's blank?

 

Actually, the field is empty

The field is a bit special as it consists of two input fields. The one with the green dot is active, the red one is inactive. You can toggle it by clicking on the red dot.
If you do that, you will see that the bottom one is a dropdown list. It is pouplated with all audio files found in the directory you specified in the SermonSpeaker options.
If the dropdown is active and you save the sermon, the selected file is then written in the upper (freetext) field.

Okay. Thank you.