Released on the 2011 compilation album Play Your Old Stuff, 'The Blue Note' stands as a defining track in the discography of the American post-hardcore band Underoath. Emerging from the genre's evolution in the early 2010s, the song blends the group's signature melodic intensity with a polished production style that marked a shift from their earlier raw sound. The recording features the band's characteristic interplay between aggressive guitar riffs and soaring vocal delivery, capturing the emotional depth often explored in their work on anthologies like Anthology 1999-2013. As a staple of their catalog, the track exemplifies the band's ability to merge emotional vulnerability with high-energy rock structures, resonating with fans who appreciate their journey through the post-hardcore landscape.