'cyclo.' is a project by Carsten Nicolai and Ryoji Ikeda since 1999. 'cyclo.' examines error structures and repetitive loops in software and computer programmed music, with audiovisual modules for real-time sound visualization forming one of the key strategies in this examination. The project orientates itself around the discipline of Phase Correlation. Within this process, the phase relationship between two inputted audio signals are metered. This metering device was developed for the monitoring and assistance of vinyl mastering, where precise parallel correlations of phases was essential for subsequent record pressing quality. It is this activity and pattern of movement that draws the curiosity of Nicolai and Ikeda. Working together, they have selected 'bits' of sound which became part of the extensive archive and library from which they used pre-constructed audio elements. The audio elements were constructed and chosen through agendas concerned with minutiae editing of frequencies (often out of our physical range of hearing), and the perpetual amassing of audio elements to an undefined point. For Nicolai and Ikeda an 'infinity index' of sound fragments is a conscious motivation that shapes the basis of their research and also feeds cyclo. with the audio material required for visuality. Releases by cyclo. are the albums 'cyclo. .' and 'cyclo. id', followed by the EP 'id' (12"). Both 'cyclo.' releases are available digitally via Noton since November 2017.