Sound Card is the most basic component of multimedia technology and is the hardware that realizes the conversion of sonic/digital signals. The basic function of the sound card is to convert the original sound signal from the microphone, tape, and optical disc to the sound device such as headphones, speakers, amplifiers, recorders, etc., or to make the instrument sound beautiful through the music device digital interface (MIDI).
The working principle of the sound card: The working principle of the sound card is actually very simple. We know that the microphone and the speaker use analog signals, and the computer can process the digital signals. The function of the sound card is to realize the conversion between the two. According to the structure, the sound card can be divided into two parts: an analog-to-digital conversion circuit and a digital-to-analog conversion circuit. The analog-to-digital conversion circuit is responsible for converting an analog sound signal collected by a sound input device such as a microphone into a digital signal that can be processed by a computer; The conversion circuit is responsible for converting the digital sound signal used by the computer into an analog signal that can be used by a device such as a speaker.
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