method One:
1. As shown in the following figure, we are near the "Fn" + "F1" key on the keyboard of the notebook.
2. A "Settings" window for the WIN8 system is then opened, as shown in the figure:
3. Here we will see a "sound" option, click to enter as shown in the figure.
4. Now we see a "Recording" tab on the right side of the "Sound" option to click on it.
5. Here we go to the "recording volume", where you can zoom in and out of speed, Min is small, Max is big:
Method Two:
1. Access to the computer Control Panel we right click on the "Start" icon.
2. Locate the Control Panel.
3. Then find "Hardware and sound" click into.
4. In the right window you will see a "voice" button, we clicked on it.
5. Then click the "Record" option in the pop-up screen, as shown in the picture.
6. In this window we will see a "microphone" device, red box, first look down:
7. Then we'll just right-click on the "Microphone"-"Properties" below and click on it.
8. Then go into the window and we find the "Level" tab.
9. Now we can adjust the size of the Oh, the effect as shown in the following picture Oh.
10. The larger the number is, the louder the sound, and then click "OK".