XBMC automatically plays the next item in the current folder. For example, in Files View: After a track has been played, XBMC would automatically play the next track in the same folder.
Queue songs on selection
When songs are added to a playlist they are queued instead of playback starting immediately.
Replaygain volume adjustments
When enabled, XBMC will read the Replay Gain information encoded in your audio files by a program such as MP3Gain and normalize the sound levels accordingly. You have the option of either using track levels or album levels.
Crossfade between songs
Enabling this will cause the player to smoothly fade from one audio track to the next. You can set the amount of overlap of the tracks from 1-10 seconds. You have the option of only crossfading between songs on the same album or all.
Determines which visualization will be displayed while listening to music. For more information, see Visualizations.
3 File lists
Enable Tag Reading
Enabling tag reading will read the tag-information written in every song. This will slow down read time of large directories (particularly over a network), but will give, if properly named, a better description of your music files. If you wish to have the tag information without having to wait for them to load each time, you can “Scan” your songs from My Music:Songs. This will read the tags of all songs in this directory (and it's subdirectories) and add the information to the database (stored in the “albums” folder). Next time you go into that directory, XBMC will first look for the tag information in the database, which should speed up the directory loading.
Track Naming Template
Controls the way that the names of songs are displayed in the UI. In order to function properly, ID3 tags need to be enabled. For a list of options that can be used, see Tags Available for Audio Files *This setting will only effect music viewed in file view or playlists. In library mode the template changes based on the sort criteria (both albums and songs.)*
Track Naming Template - right
Works in the same manner as Track Naming Template, but is used for the information on the right-hand side of the UI. It is commonly used to display the length of tracks.
Search for thumbs on remote shares
When this option is on, XBMC will search for thumbs on remote shares (which as of the time of writing includes DVD and CD media as well, due to the long seek/read times). This can often slow down listing of network folders quite dramatically (particularly if there are many items that have no thumbs), hence the option to turn it off. If you Scan your music collection while this option is on the thumbs are cached locally, and a reference to the thumb is stored in the music Library. This significantly speeds up listings. Turn the option off after the scan if you have many folders/files without associated thumbs. For more information on creating custom thumbnails, see Thumbnails