Aleph-1 is the fourth studio album by German electronic artist Alva Noto. The record was released on December 31, 2007 via iDeal Recordings label. This is an eponymous album as he used one of his stage names, Aleph-1. The concept of the album and its name, Aleph-1, derive from the theories of German mathematician Georg Cantor, who was a teacher in Halle, Saxony-Anhalt, Germany, a city, to which Alva Noto is deeply connected with through his family. In mathematical terms, is the cardinality of the set of all countable ordinal numbers or a number of elements in endless successions.