What is the use of a computer sound card?

The sound card is also called the audio card: The sound card is the most basic component of the multimedia technology, and it is a kind of hardware to realize the Sound of the acoustic/digital signal. The basic function of a sound card is to convert the original sound signals from microphones, tapes, and discs to sound devices such as headphones, speakers, amplifiers, recorders, or to make a musical instrument sound through a musical device Digital interface (MIDI).

A sound card is a computer adapter for sound processing. It has three basic functions: one is the music synthesis pronunciation function, the second is the mixer (Mixer) function and the digital sound effect processor (DSP) function, the third is simulates the sound signal the input and the output function. Sound information processed by a sound card is stored as a file in a computer. Sound card work should have the appropriate software support, including drivers, mixer programs (mixer) and CD playback program.

An interface card used to handle sound in a multimedia computer. Sound card can be from the microphone, receiver, CD player and other devices such as voice, music and other sound into digital signals to the computer processing, and file form, but also to restore the digital signal to the real sound output. The interface from the rear of the sound card extends from the rear of the chassis with an interface to connect the microphone, speakers, joystick, and MIDI devices.

Working principle

Microphones and speakers are used analog signals, and the computer can handle the digital signal, the two can not be mixed, the function of the sound card is to achieve the conversion of both. From the structural point of view, the sound card can be divided into analog-to-digital conversion circuit and the two-mode conversion circuit, the analog-to-digital conversion circuit is responsible for converting the analog sound signals produced by the microphone and other sound input devices into digital signals that can be processed by the computer, and the digital-analog conversion circuit is responsible for converting the digitized sound signals used by the computer into analog signals that can be used by devices such as loudspeakers.

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