Large Entrance

The audio begins with the distant, echoing sound of footfalls approaching a large entrance, likely an external door of a grand institution, possibly a campus building marked UPF-CS12. The footsteps, steady and unhurried, grow gradually louder, hinting at the vastness of the space and the size of the door. There is a brief pause, as if the person is taking in the imposing sight of the door before reaching out to open it. The shuffling sound of a large, heavy door being pulled open breaks the quiet. You can hear the strain of the hinges, the creaking echoing in the open expanse, indicating the enormity and weight of the big door. The door is left open for a moment, letting in a rush of ambient sounds from outside that mingles with the unique acoustics of the building. Then, there's the sound of the door closing. It is not a swift action but a slow, deliberate movement. The door grates