The Beach of Nothingness (music)

 is Disc 2, Track 6 on the Xenosaga Original Soundtrack and Disc 1, Track 10 on the album. ('The Beach of Nothingness' is an unofficial translation, as seen in the VGMdb listing of the album.) The start of Omega contains a sequence of notes similar to the main melody of this piece.

It plays in the flashback after Gargoyle is defeated, when Margulis talks to Cherenkov about their organisation's view of humanity.