+My V hezkz17 into the research and development of digital audio system Q&A group (research group)
A PC audio system working principle
The working principle of PC audio system can be briefly summarized as the following steps:
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Audio Input: Audio signals can be input to the computer in various ways, such as microphone, line-in, digital audio interface, etc. These audio sources convert sound into electrical signals.
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Analog-to-digital conversion (ADC): The audio signal passes through an analog-to-digital converter (ADC), which converts a continuous analog electrical signal into a digital signal. The ADC samples the audio signal and quantizes the amplitude of each sample point into a digital value.
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Digital Audio Processing: The computer's sound card or audio chip receives the digital audio data obtained from the ADC. These devices usually contain a digital signal processor (DSP) to perform various processing on the audio data, such as equalization, reverb, compression, etc.
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Audio transmission: The processed digital audio data can be transmitted in a variety of ways, such as connecting to the audio controller on the motherboard through an internal bus, or connecting to an external audio device through an external interface (such as USB, HDMI, optical fiber, etc.).
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Digital-to-analog conversion (DAC): Digital-to-analog conversion is required if a digital audio signal needs to be converted to an analog signal to drive speakers or headphones. The DAC converts digital audio data into an analog voltage signal, and outputs it to a speaker or earphone through an amplifying circuit.
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Audio output: After the analog audio signal is amplified and filtered, it drives speakers or earphones to produce sound.
Throughout the process, the audio system requires precise timing control and signal processing to ensure audio quality and accuracy. Different PC audio systems may have different capabilities and features, but the basic working principles are usually similar.
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