In the Apps filed, by dragging the slider to adjust volume for each app ⑦.Right-click on the taskbar ⑤, and then select ⑥. Click the speaker icon again to turn the volume on. If the speaker icon of master volume is, it means your computer is at mute mode. In Sound settings, you are able to choose the Output device ③ (such as internal speakers, external speakers, or headset) and the Input device ④ (such as internal microphone, external microphone, or earphone).Type and search in the Windows search bar ①, and then click ②.Please go to the corresponding instruction based on the current Windows operating system on your computer: