Dietrich, Frank, et al. 1984. Magic Wall: A Multi-Monitor, Computer-Controlled Installation. In: Leonardo. [unknown address]:The MIT Press

Abstract:
‘This article describes a large-scale video installation using 16 television monitors, 4 video recorders, and a specially built, computer-controlled video switcher. The installation exemplifies certain creative possibilities of computerized multi-image environments.
The contemporary background of multi-image installations is discussed briefly and the authors explain the conception and realization of the Magic Wall, a versatile display format for combining computer and video technology in a work of art. The basic configuration of this collaborative piece is described and the artists give accounts of their individual activities with the installation.’

A 4×4 composition of screens is fed by 4 video sources by a switch. This switch can be programmed so that alternately the four sources are shown in different amounts and at different places. Three video experiments with this system are described. Dietrich’s experiment was inspired by a poem of Goethe, which he retains in facial expressions.