Before the sound card came out, the computer was basically a "dumb" in addition to a simple sound from a PC speaker. Speaking of it, it's not that people don't want the computer to make a sound, but the computer at the time does not have the computing power needed to process the sound. As the performance of computers continues to increase, the use of sound cards to make computers sound is a natural thing. Since the invention of the sound card by Singapore Innovation Company in the late 1980s, sound cards have been widely used, such as computer games, multimedia education software, speech recognition, human-machine dialogue, online telephone, video conference, CD recording and VCD programs. Without a sound card, sound cards have become a must-have for all home multimedia computers and most commercial computers. 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 two can't be mixed. 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. There are usually the following jacks behind the sound card: (1) Speaker output jack Used to connect headphones or speakers. Some older sound cards have two sound outlets, one Speaking, only headphones and passive speakers; the other is Line Out, which is used to connect active speakers or audio power amplifiers. The new sound card has been merged into one. (2) Microphone input jack It is used to connect a microphone, through which you can record the sound of the outside world. (3) Line input jack Used to connect an external source such as a recorder or stereo radio for sound recording. (4) Game handle interface / musical instrument digital interface socket Used to connect joysticks and MIDI instruments. In addition to the above interfaces, the sound card also has a needle holder called a sound source cable connector. It is a 4-pin connector that can be connected to the audio port behind the optical drive by using the audio cable supplied with the CD-ROM. The sound of the time can be sent through the sound card. The audio card can beautify the sound. Can adjust the vocal balance, add the reverb effect, make the sound better. The sound card can be roughly divided into an external sound card, an onboard sound card, and a built-in sound card. The sound card is a kind of hardware, and can be connected to the computer end through different signal transmission and frequency processing. This will process your input source vocals or instrument sounds. It can also be said that your singing voice is good, because there is a modification in the middle, then there may be friends who have questions at this time. Every computer has a sound card. Why do network anchors need to purchase separate sound cards? Because the onboard sound card of the computer is configured by the motherboard itself, the processing of the sound does not meet our requirements. If there is delay and noise, the sound is seriously distorted. These are just enough to make up for the lack of independent sound card. With a sound card, you can make your voice produce a reverb effect like KTV. It is no longer as dry as an onboard sound card. You can load a vst plugin with a professional host software to handle vocals or Audio post production. With a sound card, you can make your voice realize the sound change effect, what kind of male change female, female change male, change doll sound, etc. Of course, you need to debug through software, the sound card itself does not have these functions. With a sound card, you can listen to high-quality music on the computer and listen to the sound of the game. With a sound card, you can use computer audio instruments such as guitar, MIDI keyboard, electronic drum, all through the sound linear input. First, the interface Because PCI sound cards are ten times more efficient than ISA sound cards, they are popular with many consumers. In addition, the PCI sound card has a lower CPU usage and a higher signal-to-noise ratio, and the PCI sound card technology continues to mature, which also makes the ISA sound card with a single function and occupying too much system resources appear no longer. Second, on-demand purchase Nowadays, there are many products in the sound card market. The difference in performance and price between different brands of sound cards is also very huge, so be sure to think about what you plan to do with your sound card before you buy, and how high the requirements are. Generally speaking, if it is just a normal application, such as listening to CDs, watching videos, playing some simple games, etc., all sound cards are sufficient, then you can buy a general cheap sound card; if it is used To play a large 3D game, you must purchase a sound card with 3D sound function, because 3D sound has become the trend of game development, and now all new games are beginning to support it. However, such sound cards also have high, medium and low grades, which can be considered together; if the requirements for sound cards are high, such as music enthusiasts or personal music studios, these users have special requirements for sound cards, such as high signal to noise ratio. The distortion is not big, and even the input and output interfaces are gold-plated. At this time, of course, only high-end products can meet their requirements. Third, we must consider the price factor In general, the price of a normal sound card is between 100-200 yuan. The price difference between medium and high-end sound cards is very large, ranging from a few hundred yuan to thousands of yuan. In addition to the difference of the main chip, it is also related to the brand. This should be considered comprehensively according to the budget and the characteristics of each brand. If the requirements for the sound card are high and the budget is sufficient, I personally think that it is not necessary to think too much about the price. After all, the sound card is more valuable in the various accessories of the computer, and it will never be like a video card. Tomorrow, the price changes are incredibly large, and the service life is also very long. It has the taste of “one investment, lifelong benefitâ€. So choose a product that has excellent workmanship and performance. After all, once you have selected it, it will spend a few years with you. Fourth, understand the sound chip used by the sound card Like the graphics chip of the graphics card, the role of the audio processing chip is decisive in determining the performance of a sound card; however, unlike the graphics card, not only the different chips used by different sound cards are often different, but the same one. The audio processing chips of the brand's sound card are not necessarily identical, which is complicated. Therefore, when you have roughly determined the range of sound cards to be purchased, be sure to understand the audio processing chip used in the product. It is the key to determining the performance and function of a sound card. Five, pay attention to compatibility issues The phenomenon that the sound card conflicts with other accessories is more common. It is not only a non-mainstream sound card, but even the sound card of a famous brand has this situation, so be sure to understand the configuration of your machine before purchasing, so as to avoid Compatibility occurs; such as some motherboards and SB Live using the VIA chipset! Series sound cards or sound cards with Ao Rui audio chips are prone to conflicts, the copper mine processor and SB Live! Series sound cards also have incompatibility. Six, the sound card work Sound card design and manufacturing processes are important because analog signals are quite sensitive to interference. When buying a sound card, take a look at the capacitor on the sound card and the brand and model of the Codec, and compare it against its performance indicators. It is better if you have a music enthusiast with a good ear. Some things can only be heard with your ears. You can't see them with your eyes. Remember, "Early listening, seeing is believing" is not for selecting a sound card. Truth is a fallacy.
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The role of the sound card