I usually tag my songs as recommended in this article, although I use it a bit differently than it recommends.
Like you guys use %ALBUM ARTIST% for Various Artist type situations, I use ENSEMBLE and PERFORMER for both various artists type situations, and to make a kind of "category" of music.
Thing is, most of my music files on my HD are anime soundtracks and singles. It's nice to be able to put in the metadata what show the OST or song originates from -- for example:
first, the common metadata between two songs on a given OST:
ALBUM=Scrapped Princess - Original Sound Track Vol. 1
DATE=2003
GENRE=Anime
ARRANGER=Hikaru Nanase
ARTIST=Scrapped Princess
ENSEMBLE=Scrapped Princess
And the first example, a vocal song that's used as the opening song for the show:
PERFORMER=JAM Project
PERFORMER=Okui Masami
TITLE=Little Wing
TRACKNUMBER=1
and for aother song, a BGM:
TRACKNUMBER=4
TITLE=Rakuweru no attoueki na chikara
And this is how it's used in Various Artists situation
comment[0]: ARTIST=I've
comment[1]: ALBUM=LAMENT ~GIRL's COMPILATION 4
comment[2]: TRACKNUMBER=4
comment[3]: DATE=2003
comment[4]: GENRE=Pop
comment[5]: TITLE=Save your Heart -Album Mix-
comment[6]: ENSEMBLE=I've Sound
comment[7]: PERFORMER=KOTOKO
comment[8]: PERFORMER=Utatsuki Kaori
With all that stuff combined, this would give me something to the effect of this screenshot(yes, it's running in Wine): -click-
(amazing that I've had this account for over a year and this is my first post. )