What do you plug in the blue input? : whatisthisthing
What's this blue port on this old PC? : whatisthisthing
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Beexcellent Gaming Headset GM-1 with Microphone for New Xbox 1 PS4 PC Cellphone Laptops Computer - Surround Sound, Noise Reduction Game Earphone-Easy Volume Control with LED Lighting 3.5MM Jack(Blue), Electronics, Audio on
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Tutorial - Connecting Up - Audacity Manual
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