whooah! see Constantin Lusers' Vibrosaurus here or here
At this point in time, everything about the instrument and its maker looks to be written in Austrian, nevertheless from this video the instrument looks to being played by up to 40 Brass Horn players. The Vibrosaurus is sculpturally drawn out from 10 Trombones, 10 French Horns, 10 Tenor Horns and 10 Trumpets.