2. Click on the "Settings" tab.
3. Select "Themes & Layout" from the left-hand menu.
4. Scroll down to the "Music Player" section.
5. Enter the URL of the MP3 file you want to play.
6. Select "Enabled" from the "Show Music Player" dropdown menu.
7. Click on the "Save Changes" button.
The music player will now be displayed on your ProBoards site.