313 is the fourth album released by composer Phideaux Xavier.

Xavier and his band of musicians had done three well rehearsed, well conceived albums, and decided to make an "album in a day".^{[citation needed]}

On March 13, 2004 (which was actually before they'd finished the Chupacabras album), all of Phideaux Xavier's musicians converged in L.A. for an unrehearsed recording session. During that day, they composed and recorded 13 songs; however, the final results were deemed to be nothing more than embryonic, and those sessions were shelved until after the album Chupacabras was released. In 2005, Xavier and Gabriel Moffat polished up the recordings, and on March 13, 2006, released the album 313 (named for the date upon which it was recorded).

Themes recur throughout the work, and although it is 13 separate songs, they all seem to flow together. The cover artwork for this album was by Margie Schnibbe, another childhood friend of Phideaux Xavier's, who painted a 20-page booklet that was quite a departure from the Gothic imagery of the first three albums.