The audio begins with a dissonant sound emanating from a bass guitar. There's a clear focus on the A string, which is noticeably out of tune. The narrator's voice, calm and instructive, explains how to adjust the string to achieve the correct sound. The listener can hear the subtle shifts in tone as the bass string is tightened and loosened, the dissonant sound slowly becoming harmonious. The narrator provides step-by-step guidance on how to make these adjustments, focusing on the nuances of feeling the string's tension and listening for the pitch. The audio concludes with the satisfying hum of a perfectly tuned A string, the dissonance replaced with a resonant, pleasing sound.