This audio, titled "Frequency X_012860", is a sound effects piece characterized by the distinct tones of keys. The track opens with a resonant, metallic sound as if a bunch of keys are jingling, suggesting a sense of movement or activity. The key effect is then interspersed with an underlying frequency that oscillates, creating a sense of suspense. It resembles a low hum that rises and falls rhythmically. This combination of key sounds with the varying frequency generates an intriguing, suspenseful atmosphere.