The audio begins with the distant, hollow echo of a key being inserted into a lock, the metallic resonance bouncing off the surroundings, suggesting an exterior location. There's a pause, a moment of anticipation, before the large door creaks open. The sound is rich and heavy, indicating the door's grand size and weight. Each groan of the hinges reverberates in the open air, creating a deep, haunting reverb. The door is then fully opened, its movement culminating in a resonate, low thud as it comes to rest, completing the opening of the hall door. The echo slowly fades, leaving a silence that implies the vastness beyond the now open entrance.