In the audio titled "Drilbu 01", the primary sound that captures your attention is the clear, resonant ding of a bell. The bell's tone is perfectly harmonized, with each ring beautifully echoing in the backdrop, creating an atmosphere of calm and tranquility. It is reminiscent of a bell-set, where each bell has its unique tone, but together they create a harmonious melody. The bell-tone rings out, then fades, only to be followed by another, creating a rhythmic cycle of sound. Each ring of the bell seems to ripple outwards, filling the space with its soothing vibrations. It's a symphony of bell sounds, each with its distinct ring, yet all contributing to a serene and peaceful ambiance.