Sound Cards

Sound cards (or audio cards) convert digital data into sounds that humans can hear and interpret.

The first PC's didn't have sound cards. They beeped every once in a while when they were hungry, contented, or upset, but that was about it.

Nowadays, computers can be equipped with sound systems that rival the finest audiophile-quality stereos. On the other hand, they can have sound systems that set your teeth on edge. Most are somewhere in between.

All sound cards have a stereo output that can connect to an amplified computer speaker system, and a microphone input that can be used for recording or Internet chatting. Most also have inputs for old-style joysticks and MIDI (Musical Instrument Digital Interface) devices.

Integrated Sound Cards

Many computers come with integrated sound cards built right into the computer's motherboard (the main circuit board inside the computer). Integrated sound cards range from truly awful to quite good.

But if the integrated sound chip fails, it usually is not repairable except by replacing the motherboard. Some (but not all) motherboards with integrated sound also have an expansion slot that can be used to install an aftermarket card if needed or desired.

Dedicated Sound Cards

For gamers, audiophiles, and others who really care about sound, high-end cards are available with features like Dolby Surround, graphic equalizers, and digital special effects processing; as well as an array of plugs, connectors, and wires that can confuzle even experienced computer users.

There are many makers of sound cards, but Creative Labs is the industry leader. Their product line ranges from inexpensive (but dependable) cards that are suitable for the majority of of average PC users, to high-end cards like the Audigy series.