Unreleased Musical Cues

Certain Sailor Moon background musical cues were not released on the Sailor Moon CDs. These musical cues are referred to as "Studio Library" in the Memorial Music Box booklet, which lists all the musical cues used in every episode (in Japanese :). These studio library musical cues are pieces of music lifted from other sources for use as background music. In other words it's a piece that the studio had in their library of sounds and music, and when they created that episode, they browsed thru and decided that a certain piece of music fit the scene, rather than composing an original piece.

List of Studio Library Musical Cues

Thanks to the efforts of SailorMusic.net Forums members, a fairly comprehensive listing of these Studio Library cues is available. One forum member has made audio captures of the Studio Library cues from all five seasons:

RattleMan's Sailormoon Cues Part 1 and Part 02

These clips are ripped directly from the DVDs and contain dialogue. If the piece of music you're looking for is in this list, that means the musical cue is not available on the Sailor Moon CDs and therefore does not exist for download on this site.

For descriptions of the episodes, visit WikiMoon or Bishoujo Senshi Sailor Moon Encyclopedia.

Original Sources

Many of the Studio Library cues used in Sailor Moon are taken from classical compositions, some of which have been identified by fans:

The music played during the invasion of the moon kingdom scenes in episodes 35 and 44 is taken from the Summer III-Tempo Impetuoso d'Estate section of Vivaldi's Four Seasons. I believe the version used was performed by Vanessa Mae.
Episode 35, Zosite's death is taken from Grieg - Solveig's Lied ("Solveig's Air").

Requiem - Dies Irae

Episode 92 (SMS), Haruka and Michiru VS Talismans - I don't know the name of the piece, but the music was used in a YouTube video showcasing JAL (Japan Airlines) aircraft. Here is the YouTube flash file, which you could use to convert into an audio file.
Episode 110 (SMS), music played when Haruka and Michiru hold hands. Here is a music file converted from MIDI and TV broadcast rip). Tip sent in by Raevon R.: "this BGM is a classical piece but its sorta more of a reinvented version of Sarabande by Handel".
Episode 110 (SMS), Eudial's Pipe Organ Music is taken from Bach's Toccata and Fugue in D Minor.
Episode 123 (SMS): Mozart's Adagio and Fugue In C Minor, K. 546: II. Fugue. is featured in the episode in which Cyprine and Ptilol recall the students of Infinity Academy (Mugen Gakuen) back to school to steal their heart crystals.
Episode 181 (SM SailorStars): The Marche Funebre (Funeral March) section of Chopin's Piano Sonata No. 2 in B flat minor is featured in the scene where Iron Mouse receives an ominous phone call. (Formerly identified "Iron Mouse Swan Song" in Rattleman's audio rips.)
An excerpt from Mozart's Requiem (approx. 1 hour long) is used in various episodes. For example, the BGM from an episode in the first series where Mako-chan is in the ice rink is a section from the Requiem called "Dies Irae".
Bach's Prelude in C Major is used in Sailor Stars. The track is called Kyuukyoku no Ai ("Ultimate Love") and is included on Memorial Music Box Disc 7 - Track 22 and Sailor Stars Collection Vol 2. - Track 15. (Tip sent in by Diane B.)

Pretty Guardian Sailor Moon

See the PGSM page for classical music used in the live action series.