Sound card is a computer hardware, used to strengthen and record sound. Previously, computer hardware is used to supplement the computer. Now, it is the obligation of all computers.
It is divided into three categories according to the installation. The first category is the sound card. This is directly installed on the computer motherboard. The second category is the sound card board. Install this card in the ISA / PCI slot motherboards. Finally, an external sound card.To use this computer hardware, you must connect to another computer via external interfaces like USB or FireWire.
How does it work?
When you listen to the voice of the hardware, voice, digital data waveforms, including WAV and MP3 transfer to the sound card. Digital data processing of digital signal processing (DSP) digital-analog converter (DAC) of the envelope of the digital signal into analogue signal. This is an analog signal, then amplified through a loudspeaker.
At the same time, when you record a sound through a microphone, an analog sound through DSP processing and analog-digital converter (ADC). Analog signals, and then converted into digital signals. Wave signal, and then save in a table format the disk or compressed into other formats, like MP3 players.
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