Ulf Langheinrich, and Kurt Hentschläger, founded the Viennese media art group Pyramedia. They have been collaborating since 1991 on their joint project Granular Synthesis, a term that originally derives from sound design. Granular Synthesis, are particularly interested in investigating the aesthetic potential of audio-visual re-synthesis, and are experts in the field of sound manipulation. Their live performances bombard audiences with light, video and audio projections. Recent projects include: Pol 2.0, NoiseGate-M6, Sweet Heart, X-tended Thrill and different versions of the Modell installation.
Since 2003 Langheinrich has also realized several solo projects aimed at achieving a direct sensory impact. They focus on creating specific modulations of the projected material in time and in the projection-space, and effecting interference movements between the perceptive and processing potential of the eye-brain-apparatus.