The Audio Player can play most of the common Audio formats (mp3, wav, mid, snd, wma, etc. extensions), as well as Audio CDs.  An Intro Audio clip can accompany the Album Description, and an Audio file can be associated with each Photo in an album.  When an Audio file is available, an Audio Player button will appear next to the Photo on an album page (if buttons are visible).  The Audio Player can also be accessed via a button on the Navigation Bar, from the Popup Menu or by just typing M.

Besides any Audio files that are associated with an album, the Audio Player can also play Audios from a specified Directory or Audio CDs.  The currently active Audio file or CD track is shown in the upper caption, colored according to the source:  Yellow for album Audios or selected Audio files, Blue for Audios from the active Play Directory and Green for CD tracks.  When accessed for the Intro Audio or a Photo Audio, that Audio file will be set as currently active.  When the Random option is enabled, Play Directory Audio files or CD Tracks are played in random sequence, rather than sequentially.  The Left and Right arrow buttons will switch to the Previous and Next Audio file or CD Track when applicable.  Just hit the Space Bar to pause/resume playing.

The Slide Show Configure screen contains options for controlling the Audio Player during a Slide Show.