IX is the ninth studio album by the Austin, Texas alternative rock rock band ...And You Will Know Us by the Trail of Dead, released October 17, 2014, on Superball Music.

Jason Reece explained in an interview that the band was going for a record consisting of many instrumental tracks.

As for the sound, it was inspired by Slave Ambient and Lost in the Dream, both records by The War on Drugs: "This layered Krautrock kind of vibe.

A review in Pitchfork stated, While the band may have struggled in the past to reconcile their post-hardcore roots with their art-rock ambitions*,* more often than not, "IX" marks the spot.

[13] In MXDWN, Elliot Greiner wrote, For a band that started out in post-punk and somehow wandered into the feathery territory of art-rock, "IX" is a mediocre answer to a career’s worth of solid material.