test pattern [n˚2] presents flickering black and white imagery that floats and convulses in darkness on two screens, one on the floor and another floor to ceiling, in time with a stark and powerful, highly synchronised soundtrack. Through a real–time computer programme, Ikeda’s audio signal patterns are converted into tightly synchronised barcode patterns on the screens. Viewers are literally immersed in the work, and the velocity of the moving images is ultra–fast, some hundreds of frames per second, providing a totally immersive and powerful experience. The work provides a performance test for the audio and visual devices, as well as a response test for the audience’s perceptions.
materials 2 DLP projectors, computers, speakers
dimensions dimensions variable (suggested: W12 x H12 xD25m)
date | place
APR 22 – JUN 13, 2010 “ARTe SONoro,” La Casa Encendida, Madrid, ES
concept, composition: Ryoji Ikeda
computer graphics, programming: Tomonaga Tokuyama
commissioned by La Casa Encendida
produced by Forma
test pattern is a system that converts any type of data (text, sounds, photos and movies) into barcode patterns and binary patterns of 0s and 1s. Through its application, the project aims to examine the relationship between critical points of device performance and the threshold of human perception. In this first edition of the project, an audiovisual installation, test pattern involves a sequence of tests for machines and humans, comprising visual patterns converted and generated from sound waveforms in real–time. The installation comprises 8 computer monitors and 16 loudspeakers aligned on the floor in a dark space. The 8 rectangular surfaces of the screens flicker intensely with black and white images, floating and convulsing in the darkness. 16–channel sound signals are mapped as a grid matrix, passing and slicing the space sharply. Via a real–time computer program, the signal patterns are converted into 8 barcode patterns, which are tightly synchronized. The velocity of the moving images is ultra–fast, some hundreds of frames per second at certain points, providing a performance test for the devices and a response test for visitors’ perceptions.