Computer Hardware
Sound Card
Definition
A sound card (also known as an audio card) is an internal expansion card that provides a computer with the ability to produce sound that can be heard by the user through speakers or headphones.
Why It Matters
The sound card is responsible for converting digital audio signals from the computer into analog signals that speakers can use to produce sound, and vice versa for microphone input.
Contextual Example
A musician or audio engineer might use a high-end dedicated sound card (or external audio interface) to get higher quality sound recording and playback with more input/output options.
Common Misunderstandings
- Most modern motherboards have a capable sound card integrated directly onto them, so a separate, dedicated sound card is no longer necessary for most users.
- External sound cards, which connect via USB, are also common, especially for laptops.