You can preview
(listen too) an MP3 track prior to adding it to your Playlist.
Highlight
a track in the Music Library that you wish to preview.
To the
LEFT of the highlighted track you will see a 'micro arrow'
pointing towards the track. Click this arrow to begin the preview, or go
to the menu Options/Music
Library/Preview Track.
The track will
play, however will not be present in the Playlist.
Press the Stop
button on the Player to stop the preview.