Sound cards is an Expansion Card
Apart from the basic hardware of computers, there are some expansion cards that are used for various added features in a computer.
A sound card is such an expansion card which helps in sending and receiving audio signals to and from the computer. This is mainly performed under the control of computer programs.
A sound card has various uses in a computer out of which the main purpose is to provide audio part to the multimedia applications used in the computer.
Applications such as music composition, video and audio editing and entertainments like games require audio component and this is provided by the sound cards used in the computers.
There are computers which have an in-built sound capacity while some of them use sound cards for enabling this functionality.
The sound cards use a digital to analog converter to convert the recorded sound from digital to analog format.
The output of this converter will be connected to an amplifier or headphone. Some of the advanced sound cards have more number of sound chips that provide higher data rates.
They can handle multiple functionalities simultaneously including sound production and synthesizing sound.
The professional sound cards are made for real time uses like sound recording and playback facilities. They have drivers which can be used with professional sound engineering software.
They are also known as audio interfaces in the markets. There are USB sound cards which are external boards that can be plugged to a computer through the USB port.
The consumer sound cards are normally used in home and office environments as well as entertainment needs.
They can be used for playback as well as a casual use, instead of being used for professional purposes.
These consumer sound cards pose some inconveniences if this has to be used by an audio professional for advanced uses.
