Z30huri2ba0tt12le1110

z30huri2ba0tt12le1110 (called on the JASRAC database) is Disc 2, Track 10 on the XenobladeX Original Soundtrack. It plays as the battle music in the following battles:
 * Interfearence during Serial Thriller.
 * The Rexoskell on the Emerian Battlegrounds during Definian Downfall.
 * The Xern during the Squad Mission The Soulless Paratroops.
 * The Colubrim during the Squad Mission Legendary Drake.
 * Da Dorde, Gi Bordo, Gu Galda, and Zo Zongra during the Squad Mission The Wrothian Four.
 * Wrothian A and Wrothian B during the Squad Mission Renegade Troopers.
 * The Sabula during the Squad Mission The Old Adage.
 * The Colubrim and Scintimures during Unnatural Disaster.

Etymology
The track title can be split into 3 parts: the prefix 'z30', the digits '20121110', and the letters 'huribattle'. Given that 'fu' and 'hu' are written using the same kana (script letter) in Japanese, and are pronounced the same, it is possible that the letters actually signify 'furibattle' (or 'free battle'). Alternatively, 'huri' can be taken as a romanisation of the Japanese word 不利, which means 'disadvantage', so the title may signify 'disadvantaged battle' instead.

The digits can be interpreted as the date 2012/11/10, or the 10th of November 2012, the date in which the track was recorded or mixed.

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 that the composer Hiroyuki Sawano gives codenames to tracks before he properly titles them: a letter/abbreviation followed by a number, where the letter/abbreviation corresponds to the soundtrack in question. In the case of Xenoblade Chronicles X, this letter was 'z' (Xenoblade X's Japanese name, ゼノブレイドクロス, can be romanised as Zenobureido Kurosu). The number corresponds to the ordering in which tracks were composed. 'z30' is a holdover from this codename.

Therefore, 'z30huri2ba0tt12le1110' decodes into 'The 30th track composed for Xenoblade X, (free or disadvantaged) battle theme, recorded/mixed on the 10th of November 2012'.