As the audio for "Track 4 from MD10" begins, an undercurrent of a low, steady hum provides an omnipresent audio backdrop, reminiscent of a machine left running. This hum is punctuated by the occasional hiss, like steam being released or a gas leak from a valve. The hiss is crisp, sharp, and close, suggesting proximity and a sense of immediacy. Intermittently, a buzz resonates. It's a sound that is distinct yet blends seamlessly with the hum and hiss, completing the trifecta of machine-inspired noises. The buzz is neither overwhelming nor jarring but enforces the ambiance of being within arm's reach of a working apparatus. Overall, the audio track perfectly encapsulates the nuanced symphony of sounds one might encounter in an environment dominated by machinery, creating an immersive auditory experience.