The computer audio output signal is weak, and the amplitude of the audio output voltage of the compu

Is the audio volume turned up?

The output impedance of CD players and computer sound cards is generally very low (600 ohms for audio engineering standard output impedance). The output voltage refers to the maximum value, the standard is generally rms, there are also 1V rms, and a few can reach 2V rms. The output current depends on the final low-pass filter, but in the case of an amplifier, the output current is not an important indicator, where the audio signal is mainly amplified by voltage, and the actual transmitted current is very small (the current will bring thermal noise).

In addition, the driving ability of the control line of many hosts is very weak (the driving current is small or the output voltage is low), and the situation that cannot adapt to the voltage and current requirements of the control line of some power amplifiers can also be solved by connecting this circuit. If the output audio amplitude does not meet the requirements, the following audio amplification circuit can be added before mute, +V can be connected to the original host of 12V, 8V (9V), etc., not too low, low is easy to distort, but also require this voltage to be "clean", can not have a large ripple, otherwise there will be new noise.

The landlord, according to the following road morning celebration shouting path set up the following poor noise try:

Hello, it is recommended that you go to the menu to adjust the audio settings of the projector and have a try.

Hello, it is recommended that you confirm your machine model first.

What kind of audio equipment do you have in place? Active or passive?

It depends on what sound card you're using. If it's a very common onboard sound card, it's analog, if you buy another sound card, there is a digital interface on it, it's digital, of course, it also depends on whether your speaker supports a digital interface.

I guess you should be using a speaker or two hundred dollars and an onboard sound card, so it must be analog.

Hello:——1. According to the audio output standard, the "peak-to-peak" voltage of the line output (the maximum amplitude of positive and negative audio signals) is 1V;

2. The audio output is the signal voltage, (generally isolated with a capacitor) based on the voltage, so it is a voltage signal.

Typical sound cards are analog.

An analog signal is a signal in which an information parameter behaves as continuous within a given range. or in a continuous interval of time, the characteristic quantity of the information can be presented as a signal with any numerical value at any instant.

Introduction to Analog Signals.

Analog signal refers to the information expressed by continuously changing physical quantities, such as temperature, humidity, pressure, length, current, voltage, etc., we usually call analog signals continuous signals, which can have an infinite number of different values within a certain time range. A digital signal, on the other hand, is a discrete and discontinuous signal in terms of value.

In actual production and life, various physical quantities, such as the image taken by the camera, the sound recorded by the tape recorder, the pressure, flow t, speed, humidity recorded in the workshop control room, etc., are all analog signals. Digital signals are sampled, quantized, and encoded on the basis of analog signals. Specifically, sampling is the pressing of an incoming analog signal.

The appropriate time interval yields the sample values for each moment in time. Quantization is to represent the values of each time measured by sampling in binary symbols, and coding is to arrange the binary numbers generated by t-generation together to form a sequential pulse sequence.

In the process of analog signal transmission, the information signal is first converted into an almost "identical" fluctuating electrical signal (hence the name "analog"), and then transmitted by wired or wireless means, and the electrical signal is received and restored into an information signal through the receiving device.

Analog signal refers to information expressed in continuously changing physical quantities, the amplitude, frequency, or phase of the signal changes continuously over time, the sound signal of broadcasting, the image signal of television, etc.

Analog signal advantages.

The main advantage of an analog signal is its precise resolution, which ideally has an infinite resolution. Analog signals have a higher information density compared to digital signals. Since there is no quantization error, it can be used to approximate the true values of physical quantities in nature as closely as possible.

Another advantage of analog signals is that when the same effect is achieved, analog signal processing is simpler than digital signal processing. The processing of analog signals can be achieved directly through analog circuit components (e.g., operational amplifiers, etc.), while digital signal processing often involves complex algorithms and even requires specialized digital signal processors.

Analog signal disadvantages.

The main disadvantage of an analog signal is that it is always affected by noise (undesirable random variations in the signal). After a signal has been replicated multiple times, or transmitted over long distances, the effects of these random noises can become significant. In electricity, these negative effects can be mitigated to some extent by the use of a ground shield, good line contact, and the use of coaxial or twisted pairs.

Noise effects can cause damage to the signal. It is almost impossible for a lossy analog signal to be restored again because amplification of the desired signal amplifies the noisy signal at the same time.

Sound card output? Analog signals.

Coaxial, fiber-optic, these two are digital.

The computer must have a separate sound card! In this way, the sound quality can be guaranteed. And the independent sound card has a lotus interface.

The impedance of the output audio information matches the input impedance of the power amplifier. (Do not use the headphone jack of your computer to output audio signals!! One is too much noise, and the other is that the impedance does not match, resulting in sound distortion).

The output of the power amplifier is connected to the speaker. The impedance of the speaker is 4 or 8 ohms.

The impedance of the Mandarin cylinder is 600 ohms. Therefore, the impedance of the microphone interface on the power amplifier is also 600 ohms.

To understand the relationship between input impedance and output impedance, it may take too many words.

Just give you a way.

The computer must have a separate sound card! In this way, the sound quality can be guaranteed. And the independent sound card has a lotus interface.

The impedance of the output audio information matches the input impedance of the power amplifier. (Do not use the headphone jack of your computer to output audio signals!! One is too much noise, and the other is that the impedance does not match, resulting in sound distortion).

The output of the power amplifier is connected to the speaker. The impedance of the speaker is 4 or 8 ohms.

The impedance of the Mandarin cylinder is 600 ohms. Therefore, the impedance of the microphone interface on the power amplifier is also 600 ohms.

I don't know if you're asking about the background** kind of power amplifier with ceiling speakers If it is, generally use a lotus one, with a lotus mouth.

If you want to connect the MIC of the power amplifier, it is not possible, the output voltage of the sound card is close to 2V, and the microphone is only tens of MV at most

Have you ever seen what a discrete sound card looks like?

Since it is a new machine, confirm that it is a computer problem and go directly to after-sales.

Question: What is the reason for the poor sound quality of playing accompaniment on the computer during the live broadcast.

Is it a problem with the sound or a problem with the sound card.

The answer is generally always poor sound quality caused by bad speakers,The current sound card is still OK You try to change the speaker,Or use headphones to see,Is it a problem with the speaker or a problem with the sound card,Then choose a different approach。

Question: If it's a speaker problem, what kind of speaker needs to be replaced.

Answer: Lenovo on the market now,Patriot and other brands are good,You go to investigate,Change to a good speaker with good quality and low price,After all, the sound quality of the speaker is not good, and it has brought you a lot of trouble,I hope my answer can help you。