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You can connect a headset to your PC in one of two ways: with a USB connector or with jacks (typically, 1/8-inch jacks). USB keeps the audio signal in the digital domain until it reaches a digital-to-analog converter, which can be inline with the cable or inside the headset. These designs prevent electrical noise from the PC's motherboard and other components from contaminating the audio signal. If you've invested in a high-end sound card, or a motherboard designed to isolate its onboard audio components from electrical interference, a good analog headset will deliver excellent audio quality.??