This is an internal device which controls and produces any sounds including music that your PC makes.

Sound cards come with various specifications, for example some have more inputs/outputs than others allowing for 5.1 surround sound etc, others have a higher sampling frequency to give better sound recording.

Sound cards can also come built-in to motherboards (mainboards), although the built-in cards are usually sufficient for most uses they can be lacking in quality and features if you intend to record or create digital music or sounds.

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