Let's take a look at ReaItek HD Audio-Right Click Properties-Properties-Audio Device ReaItek HD Audio-The following properties-Use audio function on this device-Check-Apply.
Debugging: control panel-high definition audio configuration-mixer-playback-right pull >; It-RearpinkIn-hits X to mute it and pushes the rest up. Recording-Stereo Mix-Press X to mute.
Right-click the speaker in the lower right corner (turn up the speaker volume)-Adjust audio properties-Volume-Device volume-Advanced-(turn up the main volume)-Options-Properties-Check the microphone volume-OK. Back to Options-Advanced Control-Advanced-Microphone Reinforcement Hook.
Display method of small speaker in the lower right corner: Start-Settings-Control Panel-Sound and audio equipment-Volume-(check) Put the volume icon in the taskbar.
How to operate a webpage without sound: Open the webpage-Tools-Options-Advanced-(check) Play the sound in the webpage.