Solve the problem that Win7 system plays web video without sound

Local player listens to songs and movies, but it plays the video of Tudou, Youku, Yo and other websites, as well as RMVB and WMV videos in online movies. The sound, the music on the web page can't be heard. You can hear the sound by playing video, music, and FLASH on the hard disk. It can be concluded that this has nothing to do with the driver. Reloading the drive did not help. If you have encountered such problems, solve them together:

This problem is also very common in Windows XP/Vista. It is not related to Windows 7. Generally, what optimization software is used or installed and uninstalled. Kind of decoder caused.

To solve this problem, click “Start”Menu→“Run"Enter“regedit” and press Enter to open the Registry Editor, click on the left pane and click ldquo ; HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows NT/CurrentVersion/Drivers32”, then check in the right pane for the value of "wavemapper". If not, right-click in the blank space on the right pane to create a new string value called “wavemapper”, and then double-click the value to set its “Value Data” as “msacm32.drv”, Restart your computer to resolve the issue.

Tip: If there is no sound after setting according to the above method, please check if there is a volume icon in the system tray. If not, open “sound and audio device properties”, select “put the volume icon into the taskbar", and there will be a sound.