Microsoft introduced this device connection sound with Windows 7 in 2009, part of a set of soft, rounded system tones meant to feel calmer than the sharper sounds of Windows XP. It plays automatically whenever Windows detects new hardware, most famously a USB stick, and a generation of PC users learned to link those two rising notes with something being ready to use. It lived on through nostalgia compilations and tech memes, often dropped beside a modern notification chime or a simple ding sound effect for a retro computer joke.