Katedrala [The Cathedral]

computer generated environment and performance [1988, Zagreb]

The place of happening is devided in three spaces. The audience arrives
into the gallery entrance-hall which the authors named after Mussorgsky. In
1874. inspired by the architectonic drawings Mussorgsky has translated
visual language into a musical score in his music composition "Pictures at
the Exibition". The authors have based their idea of the first space on the
similar principle, where they exposed visual objects (mobiles) which are at
the same time musical instruments because they produce sound. While passing
through the first space the audience is followed by a camera and this image
is transmitted to the monitor in the second space. At the same time the
audience in the first space can follow the movement of the audience in the
third space. In the second and third space there are photo sensors
installed and they register the passage of the spectators and interactively
trigger the sound production.

The second space is named after Vasilij Kandinsky. Here two flash-slide
projections show sketches from visual performance Kandinsky made after the
above mentioned work of Mussorgsky in early 1928. Kandinsky did an
inversion and brought music into visual context. It was the first
documented multimedia performance, a geometrically abstracted light
composition with a dramaturgical line of a happening.
Apart from this reference on Kandinsky the second space also contains a
kintetic-sound installation, a quotation of the "Nude Decsending a
Staircase" (1912) by Marcel Duchamp, and another slide projection: an image
of a clock.

The third space is named after Joseph Beuys. Therefore the audience walks
on soft floor.  An installation made of screens with Josko Lesaja (tenor)
standing on top of it and singing a musical collage made of fragments from
different operas occupies the central place in the room. Above the singer's
head there is a pyramid shaped metal construction. We can see people
passing by the two different spaces (space  one and space two) on the
screens that make up installation. On the side walls there are three slide
projections. During the happening, which lasts a little less than an hour,
approximately a thousand images are projected. They have different origins
and themes: nature phenomenas, micro and macro photography, industrial
landscapes, visual material taken from the media reality and the like. This
collection of images is based on formal and visual analysis of perception
and contains different textures, multiplications, colour contrasts and
compositional elements which allude to relationship between two-dimensional
and three-dimensional, spatial illusions etc.
The system of slide projections and sound is triggered and controlled in
two ways (an interface with two inputs). On one hand by passing of the
audience and on the other by an electroencephalograph (EEG). In a word,
special sensors connected to the singer's head register activities in his
brain cells and these subtle  organic moves change the production of sound
and slide projections in space.  

> much more about The Cathedral 1988 project [partly English, more Croatian]