what is sound card in computers?

The simplest description is that it converts the digital sources of sound and music of files and programs on your computer into analog signals that can be played on speakers or headphones.

An article " How Sound Cards Work" at HowStuffWorks.com can answer your question. It tells you what is sound card and also how it works and much more information. Please go through the link.http://computer.howstuffworks.com/sound-card.htm>>> Naveen Kumar

Also called a "sound board" or "audio adapter," it is a plug-in card that records and plays back sound. Supporting both digital audio and MIDI, sound cards provide an input port for a microphone or other sound source and output ports to speakers and amplifiers. Sound circuits are typically built into the chipset on the motherboard, but can be disabled if a separate sound card is installed.

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