Relative Realitäten / Relative Realities

An enhancement of reality in co-operation with Thomas Grill
2007 -

Installation @ Ars Electronica Festival 2016, Mariendom Linz, A


A pendulum swings through a space. A video screen, constituting its pendulum bob, carves its path through the exhibition space. It presents – from its ever changing position – a view upon another scenery. Slowly it passes the tree and the table; and then it returns. Although freely swaying through space it collides with objects; invisible, but audible. A computer traces the pendulum’s position and – in a computer model – embeds it into a mathematical world where it collides and interacts with objects. This interaction between the pendulum and its mathematical surroundings provides the source for a threedimensional soundscape. Something is forced into motion. Slowly it returns to standstill. Next time things will behave rather similarly. Only the world in the computer changes.

Installation at Wien Modern / Semper Depot, Vienna, A

Installation at Klangraum Krems / Minoritenkirche, Krems, A

Presented in different versions at

2016 / Ars Electronica Festival, Mariendom, Linz, A

2010 / Experimental Media and Performing Arts Center (EMPAC), Troy, USA
2009 / Habitación del Ruido, Universidad del Claustro de Sor Juana, Mexico City, MX
2008 / Klangraum Krems / Minoritenkirche, Krems, A
2007 / Wien Modern / Semper Depot, Vienna, A

A co-production of

Wien Modern
Klangraum Krems
Interessensgemeinschaft Aufstieg

Artistic concept, audio and visuals

Volkmar Klien

Sensorics, modelling and video engine

Thomas Grill

Technical production


Pendulum Driving device:

Bernardo Niederhageböck & Gerald Hanisch

Color grading:

Lisa Truttmann

Panoramic photography and documentation in Vienna

Andreas Gartner

With the support of


Niederösterreich Kultur – Kunst im öffentlichen Raum
Bundesministerium für Unterricht, Kunst und Kultur
Musik Aktuell
Theodor Körner Fonds