There are several artists who use the name Aleph Null.

1) Aleph Null is a Sludge / Stoner Metal band from Germany that formed in 2011. They have their music available for free on bandcamp

2) Aleph Null is the techno DJ pseudonym of Anthony Bowyer-Lowe, AKA ynohtna, AKA The Essence Of Anthony. His mixes are available for download at muso.ciety.

3) Aleph Null is an industrial band on the Deathkon Medias label. The band is known for mixing the genres of IDM and Classical with heavily distorted and overamped drums. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.