Office Building features the ambiences one can hear sometimes around midnight or in the early morning hours. During these times employees are usually at home and only service staffs are around so that the building can unfold its own sounds of ventilations, elevators and wind that blows through tilted windows. Automatic switches occasionally ignite neon lights along the floors or elevator doors open from out of nowhere. The library contains 79 files in 5 categories: DOORS, ELEVATORS, NEON LIGHTS, ROOM TONES plus several takes from the building´s EXTERIOR surroundings.