Solve Windows 7 system playing web video without sound

        Today, I encountered a strange thing. The local player listened to the song and watched the movie. But it played the flash of Tudou, Youku, Yo and other websites, as well as the RMVB and WMV videos in the online movie. There is no sound in the webpage. Can't listen. You can hear the sound by playing videos, music, and Flash animations on your hard disk. It can be concluded that this has nothing to do with the driver. Reloading the drive did not help. If you encounter this problem, work together to solve:

this problem in WindowsXP /Vista is also very common, nothing to do with Windows7, generally use what optimization software or install, uninstall various decoding Caused by the device.

To solve this problem, you can click the "Start" menu → "Run" enter "regedit" and press Enter to open the Registry Editor, click in the left pane "HKEY_LOCAL_MacHINE /SOFTWARE /Microsoft /WindowsNT/CurrentVersion/Drivers32", then check for the "wavemapper" value in the right pane. If not, right-click in the blank space on the right pane to create a new string value named "wavemapper", then double-click the value to set its "Value Data" to "msacm32.drv" and restart the computer. Can solve the problem.

Tip: If you set in accordance with the above method Moyoushengyin, pay attention to check there is no volume icon in the system tray. If not, open "Sound and Audio Device Properties" and check "Put the volume icon into the taskbar" and there will be a sound.