Z10b2r0i1e2f0i9n1g3

z10b2r0i1e2f0i9n1g3 (called on the JASRAC database) is Disc 2, Track 3 on the XenobladeX Original Soundtrack. It is split into two parts: the first plays from the start until 2:14, and the second plays from then until the end.

The first part plays when customising Cross, as well as in the following cutscenes:
 * Nagi and Elma explain FrontierNav to Cross in.
 * The party is briefed on the mission to recover Nelson's team in.
 * The party is briefed on the mission to recover a piece of the Lifehold in.
 * The party is briefed on the mission to investigate the Ma-non Ship being attacked in.
 * The party is briefed on the mission to assist Lao's team during A Friend In Need.
 * The party is briefed on the mission to retrieve the Vita from Noctilum in.
 * Elma sends Gwin off to perform tasks with an underpowered weapon during Boot Camp.
 * and Lin send Cross out to gather materials during A Girl's Wings.

The second part plays in the following cutscenes:
 * Doug briefs the party on his mission during Close Comrades.
 * The party is briefed on the mission to recover a piece of the Lifehold in.
 * Chausson asks the party to infiltrate Jair Fortress during Spy Games.
 * The party is briefed on the mission to find the supposed piece of the Lifehold in.
 * The party is briefed on the mission to hunt out Ryyz and Dagahn during Manhunt.
 * Vandham apologises for sending the party on a dangerous goose-chase, and asks them to repair a probe in Sylvalum during.
 * Vandham tells the party where the Lifehold Core is and makes Elma acting commander in.

Etymology
The track title can be split into 3 parts: the prefix 'z10', the digits '20120913', and the letters 'briefing'. The letters likely indicate how this track is used during many cutscenes when the party is briefed on their next mission. The digits can be interpreted as the date 2012/09/13, or the 13th of September 2012, possibly the date in which the track was composed or recorded. The track is one of several in the XenobladeX Original Soundtrack beginning with 'z' and a number (possibly followed by 'b'); the significance of this is unknown.