Sol Niger Within is the first and only release by Fredrik Thordendal's Special Defects, a side project of Meshuggah guitarist Fredrik Thordendal. The album was originally released in 1997 on the Ultimate Audio Entertainment label. The album was remixed and re-released by Ultimate Audio Entertainment and Relapse Records in 1999 under the title "Sol Niger Within version 3.33". The re-release contains two bonus tracks but omits several parts of the original version. A number of other releases also exist. The sound of the album is a unique combination of complex jazz elements and the mathematical extreme metal approach of Meshuggah. The disc contains one long song, which is indexed into several pieces so that you can skip ahead in the track. Certain pieces run the course of 15-20 seconds, while others push toward the two- or three-minute range. The album contains several references to Meshuggah's works. The last song, "Tathagata", is almost exactly identical to the ending of the song "Sublevels" from Meshuggah's Destroy Erase Improve album. Additionally, the song "Sensorium Dei" contains the lyric "Contradiction Collapses". The album features drums by Morgan Ågren and keyboards by Mats Öberg, members of the Swedish Mats/Morgan Band, both of whom performed with Frank Zappa. <a href="https://www.last.fm/music/Sol+Niger+Within">Read more on Last.fm</a>. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.