In the centre of the room is a round black chair-like object on which the viewer can sit down. OMO, as the artist calls his seat object, works with sound pressures whose oscillations are transferred to the recipient through, in particular, the resonance of the body. The subaudio-frequency waves surging from the object's interior seem like the vibrating pulse of a constantly decelerating heartbeat; around it rages the noise of a simulated wind caught up in an apparently infinite spiral movement. The artist converts into an acoustic model an optical illusion comparable with M.C. Escher’s graphic representations of never- ending staircases. Overlayered at varying speeds, the differentiated sound waves produce in the visitor the vision of a continuously accelerating, infinitely ascending space. Jan-Peter E.R. Sonntag links up different phenonema from the visual arts, experimental music and psycho acoustics as he searches for ways to make space experiencable. Many of his works are based on the incorporation of the recipients in their own process of perception, involving a sensorial and physical confrontation with their surroundings that provokes graphic associations with virtual spaces. 1 seat object, four 2-way tube loudspeakers, carcass resonators, 4-channel hard-disk player, CD player, control PC, amplifier, 4 audio channels