An in-vehicle display system is installed in a vehicle for displaying information to a user. Magnetic attraction is used to compensate for leveling errors of an approximately or partially leveled pendulum platform that is suspended from a flexible suspension element having a predetermined material stiffness. Each photovoltaic module includes multiple photovoltaic cells and multiple converters. This enables the use of a metallic chassis. Because the pneumatic cylinder is not attached to the piano frame, the piano lid can be completely removed without the use of tools. As an alternative, an auto-regressive pre-filter can be added in front of the lossless transformation, for raising the level of frequency regions with low power to decrease the dominance of rounding errors in these areas.