Two solutions for low-voice Ubuntu

In ubuntu, the sound is very small by default, which requires simple settings when it is very inconvenient to use.
There are two methods

Method 1:

1. Enter alsamixer in the terminal

2. A sound setting chart will pop up. You can set the sound size with the upper, lower, left, right, or scroll wheel. The main options are master, PCM, and front. The specific settings should be based on your needs.

Set to complete Ctrl + z

Method 2

Set using alsamixer Manager

1. alsamixer manager is not installed by default. It can be used only after installation.
Enter:
Sudo apt-Get install gnome-alsamixer

Alsamixer manager is automatically installed,

2. After the installation is complete, click: ApplicationProgram-- Audio and video -- the gnome ALSA mixed speaker will pop up a sound setting interface similar to method 1. You can set the sound size,