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Hello everyone, in this lesson we will introduce the sound card on the mainboard

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A sound card is a device used to process sound

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The sound is an analog signal, while the one on the mainboard is a digital signal

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So the role of the sound card is the digital-to-analog conversion

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Generally, when there is a problem with the sound card,

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the computer will experience various sound-related failures.

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For example, the computer has no sound

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The sound cards we are talking about here are all onboard sound cards,

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such as PCIE sound cards or USB sound cards are not in our scope of discussion

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There are so many chips on the mainboard, how do we judge which chip is the sound card

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We can use the following two methods to identify the sound card

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The sound card is generally in the lower left corner of the mainboard,

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and there are many capacitors around the sound card

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For example, this is the sound card chip

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It has a lot of capacitance around it

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This is the first method of judging

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Next, let's look at the second judgment method

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If we observe the mainboard carefully,

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we can see that most of the mainboards have an isolation strip in the lower left corner.

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When booting up, you can see the isolation strip glow

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This isolation band is used to isolate the analog signal of the sound card from the digital signal

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So we only need to find this isolation strip, find the chip it points to along the isolation strip,

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and find the sound card chip

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Finally, let's introduce the audio interface on the mainboard.

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There are generally 3 audio interfaces on the mainboard, blue, green, and pink

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Blue is audio input

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Green is audio output

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Pink is microphone

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Green and pink are the most used

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Some high-end mainboards will have three more colors, namely orange, black and gray

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These three interfaces are for building surround speakers.

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The orange one is the center speaker, the black one is the rear speaker

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The gray ones are side surround speakers

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But today's mainboards are smarter

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We can forget about these colors

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Generally, after plugging in the device, the system will prompt us with their corresponding functions

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These are the basic introduction of the sound card