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1. Reasons why there is no sound from the microphone input
There is no sound from the microphone, there is a problem with the microphone setting or hardware damage.
If the microphone is working properly, an icon will appear in the lower left corner of the computer.
Two, the solution
1. Turn on the microphone privacy permission
打开访问权限
2. Set the replacement input device
打开声音设置，选择输入设备“麦克风阵列”，麦克风测试有闪烁，说明设置正确。
3. Open the microphone settings
在麦克风输入处，点击“设备属性”、“其他设备属性”，设置最大音量
4. Update the sound card driver and restart the computer
网页下载驱动大师，声卡驱动更新或重装。并重启电脑
5. The equipment is damaged, replace the equipment
上述方法都不行，更换输入设备为“耳机”，进行步骤1、步骤2、步骤3。
仍失败，说明电脑控制声音录制的硬件损坏。