Photo Album offers a variety of music tracks to play during your slideshows. You can select from several built-in tracks, and you can upload your own music. When you play or share a slideshow, the music you select plays in the background.
For more information about uploading music, see Managing Music Files in Photo Album.
During a video the music fades, but keeps playing in the background. You can control the music by lowering the volume using the volume control or muting it by clicking the volume control icon. The background music returns to regular volume when the video completes and the slideshow rotates to the next picture or video.