A sound card (also know as an audio card) is a computer expansion card that facilities the inputandoutput of audio signals to and from a computer under control of computer programs.Typical uses ofsound cards include providing the audio component for multmedia applicationssuchasmusiccomposition,editingvideooraudio,presentation,education and entertainment(games).Manycomputers have sound capabilites built in,while others require additional expansion cards to provide for audio capability.Sound cards usually feature a digital to analog converter(DAC),which converts recorded or generated digital data into an analog format. The output signal is connectedtoan amplifier,headphones or external device using standard interconnects or an RAC connector.
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