Editing The Big O (section)

===Music===
{{main|Music of The Big O}}
''The Big O'' was scored by ''[[Geidai]]'' alumnus [[Toshihiko Sahashi]]. His composition is richly symphonic and [[classical music|classical]], with a number of pieces delving into [[electronica]] and [[jazz]].<ref name="theEX-OST">{{cite web|url = http://www.ex.org/5.4/33-cd_big-o.html|title = ''The Big-O'' Original Sound Score|last = McCarter|first = Charles|access-date = 2006-12-15|publisher = EX: The Online World of Anime & Manga|url-status = dead|archive-url = https://web.archive.org/web/20070209174450/http://www.ex.org/5.4/33-cd_big-o.html|archive-date = 2007-02-09 }}</ref> Chosen because of his "frightening amount of musical knowledge about TV dramas overseas,"<ref name = "AnimePlay"/> Sahashi integrates musical homages into the soundtrack. The background music draws from ''[[film noir]]'', [[spy film]]s and [[sci-fi]] television series like ''[[The Twilight Zone (1959 TV series)|The Twilight Zone]]''. The battle themes are reminiscent of [[Akira Ifukube]]'s compositions for the ''[[Godzilla]]'' series.<ref name = "influences"/>

The first opening theme is the [[Queen (band)|Queen]]-influenced "Big-O!".<ref name="theEX-Single">{{cite web|url=http://www.ex.org/5.3/51-cd_bigo.html|title=The Big O! CD Single|access-date=2006-12-08|last=McCarter|first=Charles|publisher=EX: The Online World of Anime & Manga|url-status=dead|archive-url=https://web.archive.org/web/20061207103143/http://www.ex.org/5.3/51-cd_bigo.html|archive-date=2006-12-07 }}</ref> Composed, arranged and performed by Rui Nagai, the song resembles [[Flash (song)|the theme]] to the ''[[Flash Gordon (film)|Flash Gordon]]'' film. The second opening theme is "Respect," composed by Sahashi. The track is an homage to the music of ''[[UFO (British TV series)|UFO]]'', composed by [[Barry Gray]].<ref name="ACen03"/> In 2007, Rui Nagai composed "Big-O! Show Must Go On," a 1960s [[hard rock]] piece, for [[Animax]]'s reruns of the show; this composition replaced the original opening themes for the Blu-Ray release of the series. The closing theme is the slow love ballad "And Forever..." written by Chie and composed by Ken Shima. The duet is performed by Robbie Danzie and Naoki Takao.

Along with Sahashi's original compositions, the soundtrack features [[Frédéric Chopin|Chopin]]'s [[Preludes (Chopin)|Prelude]] No. 15 and a jazz saxophone rendition of "[[Jingle Bells]]." The complete score was released in two volumes by [[Victor Entertainment]].