SubSonic assumes you are controlling your music storage hierarchy. This means that the program assumes you are organizing your music via the file system, not by "tags" embedded in the music files.
The term "album" is synonomous with "folder". On SubSonic's Home screen, when it says it's displaying 10 albums, it's really displaying 10 FOLDERS (which it assumes is a collection of songs on a particular album).
So, if all your music is in one big folder (shame on you) and you are relying on some music player to organize and display the music in some hierarctical format, SubSonic is going to be painful for you. SubSonic assumes that the ROOT of your music folder doesn't have music in it - but is INSTEAD filled with ARTISTS folders. Within the ARTISTS there are ALBUMS folders (which are their own folders) and within those albums are SONGS on that album.
In fact, songs that are on the ROOT of your music folders will NOT show up in the Android SubSonic app for playback - despite the fact that you CAN get to them from the web interface. Make sure all your music is in a folder off the music folder you have specified.
For example, if your music folder is C:\MUSIC - make sure there are no songs in that folder - only more folders:
C:\MUSIC\BEACH BOYS - CALIFORNIA GIRLS.MP3
... will NOT show up at all in the Android app - and will appear on the BOTTOM of the music listings in the web interface.
C:\MUSIC\BEACH BOYS\BEACH BOYS - CALIFORNIA GIRLS.MP3
... will render you the response you're probably expecting. It will show up in the Android app under BEACH BOYS and it will show up in it's own section within the web interface.
Even better would be to adopt this hierarchy:
C:\MUSIC\BEACH BOYS\GREATEST HITS\BEACH BOYS - CALIFORNIA GIRLS.MP3
The reason being that SubSonic will assume ALL the songs in a folder BELONG TO THE SAME ALBUM. If they don't, your cover art is going to be ... random seeming ... at best. If you have a ton of Beach Boys in a folder from different albums, SubSonic will get the album name from one of them, throw the artwork in the folder, and EVERY song in that folder will show that cover art - right or wrong.
BAD METHOD (you're asking for trouble)
C:\MUSIC\JOURNEY - SEPARATE WAYS.MP3
C:\MUSIC\JOURNEY - WHEEL IN THE SKY.MP3
C:\MUSIC\JAMES BROWN - I FEEL GOOD.MP3
C:\MUSIC\JANET JACKSON - RHYTHM NATION.MP3
OK METHOD (Expect the unexpected; music will be available but cover art will be whacked)
C:\MUSIC\J\JOURNEY - SEPARATE WAYS.MP3
C:\MUSIC\J\JOURNEY - WHEEL IN THE SKY.MP3
C:\MUSIC\J\JAMES BROWN - I FEEL GOOD.MP3
C:\MUSIC\J\JANET JACKSON - RHYTHM NATION.MP3
GOOD METHOD (music will at least be organized and available in SubSonic; cover art will show the right artist, but wrong album)
C:\MUSIC\JOURNEY\JOURNEY - SEPARATE WAYS.MP3
C:\MUSIC\JOURNEY\JOURNEY - WHEEL IN THE SKY.MP3
C:\MUSIC\JAMES BROWN\JAMES BROWN - I FEEL GOOD.MP3
C:\MUSIC\JANET JACKSON\JANET JACKSON - RHYTHM NATION.MP3
BEST METHOD (cover art should be accurate, etc)
C:\MUSIC\JOURNEY\FRONTIERS\JOURNEY - SEPARATE WAYS.MP3
C:\MUSIC\JOURNEY\GREATEST HITS\JOURNEY - WHEEL IN THE SKY.MP3
C:\MUSIC\JAMES BROWN\GREATEST HITS\JAMES BROWN - I FEEL GOOD.MP3
C:\MUSIC\JANET JACKSON\RHYTHM NATION\JANET JACKSON - RHYTHM NATION.MP3
TOTALLY ANAL METHOD (like the BEST version above, but you really need something else to occupy your free time)
C:\MUSIC\80S\J\JOURNEY\FRONTIERS\JOURNEY - SEPARATE WAYS.MP3
C:\MUSIC\70S\J\JOURNEY\GREATEST HITS\JOURNEY - WHEEL IN THE SKY.MP3
C:\MUSIC\OLDIES\RHYTHM AND BLUES\J\JAMES BROWN\GREATEST HITS\JAMES BROWN - I FEEL GOOD.MP3
C:\MUSIC\DANCE\FEMALE\J\JANET JACKSON\RHYTHM NATION\JANET JACKSON - RHYTHM NATION.MP3
So the moral of the story - be anal with your music filing system. Most people using SubSonic are probably 80-90% of the way there already; it's the iTunes people that are due for a rude awakening.