LP Underground 9.0, often known as LP Underground 9.0: Demos, is a CD and digital download set released in November 23, 2009 by Linkin Park Underground.The EP was the tenth released EP by LP Underground. This album is one of the albums released per year by the fan club.

Content

Due to the length that is longer than 25 minutes and nine tracks, the release is identified as an album, more specifically, a compilation album, as it features unreleased demos by Linkin Park. This also applies to the later releases of LP Underground after this album. The album contains nine tracks. All the nine tracks are demo of the tracks and singles included in the studio albums by Linkin Park, such as Hybrid Theory (2000), Meteora (2003) and Minutes to Midnight (2007). Some of the demos in the LP Underground album are unreleased, including the hit song "Across the Line". The demos included in the album are spanning the career of Linkin Park.