Alva Noto returns to his much awaited Xerrox project with Vol. 4, the fourth installment of the five-piece intended series based on the concept of digital replication of source material. Using the process of copying as a basis, the Xerrox series deals with the manipulation of data by means of endless reproduction. Due to the inherent fallacy of the procedure involving the making of copies made from other copies, everyday’s sounds become so altered that they can be hardly associated with the source material. As a result, entirely new sounds are created: copies of originals become originals themselves.