A sound card, also known as an audio card, is a hardware component that enables a computer to play audio and record sound. It converts digital audio signals into analog audio signals that can be played through speakers or headphones, and vice versa for audio recording. Sound cards can support multiple audio input and output channels and improve the overall sound quality compared to the built-in audio capabilities of a computer. They are commonly used by gamers, music producers, and audio enthusiasts who require high-quality audio output and input.
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