No6=LP

no6=LP (called in the JASRAC database) is Disc 1, Track 6 on the XenobladeX Original Soundtrack (making it the sixth track in 0rCH-SUITE "X"). z7b2012lp0427arr and PianoX2 are remixes of this track. Wir fliegen (and, by extension, X-BT2) use the melody at 1:13 as a motif.

It plays at the end of Frye and Phog's Affinity Mission Blitzkrieg if the player chooses to go to Bedrock Hold with Frye, when the two brothers make up outside of New Los Angeles. Since this track only plays once in this optional route, it's possible to never hear the song in-game, even on a full playthrough.

Etymology
The no6= at the start of the track indicates that this is the 6th track on 0rCH-SUITE "X". 'LP' (which also appears in the JASRAC title) may be short for 'Life Point', the Japanese name for the Lifehold.