Solution for low-volume headphones in Ubuntu

The speaker sound is okay, but the Speaker cannot be turned on at work. When the connector is set to "anolog headphones" in the audio output preferences, only the headset is output, and the sound heard by the headset is very small, adjusting the output volume to a large amount does not have any effect. After finding a circle on the internet, I finally solved the problem, as shown below:

Enter alsamixer on the terminal and press enter to display the sound card setting option.

Here, the front parameter is set to 0 at first, and the sound will increase after it is increased. It is best to set it to the maximum value (with the up arrow ).

The frontend amplifier should be the front-end amplifier. The first one is 0, and the sound is not amplified. It is no wonder that the sound is very small when the headset is used for output. Front mi does not know what it is. It is recommended to adjust it to the lowest level if there is noise after it is enabled.