Win7 System Watch web video no sound what to do

Win7 system local Player listen to the music and see the movie. But it plays the web site of Tudou, Youku, Yo and other websites, as well as the RMVB in the online movie, WMV video without sound, the same music on the Web page can not hear. You can hear sounds when you play video, music, and flash animations on your hard disk. Can be produced to conclude that this has nothing to do with the driver. The reload drive is also useless. This problem is also common in Windows Xp/vista, which is not related to Windows 7, and is typically caused by the use of optimized software or by installing and uninstalling various decoders.

To resolve this problem, you can click the Start menu → run enter "regedit" and return to open Registry Editor, and in the left pane click HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionDrivers32 ", and then in the right-hand pane check for" Wavemapper "value. If not, just right-click in the right pane, create a new string value named "Wavemapper," and then double-click the value to set its numeric data to "Msacm32.drv" and restart the computer to fix the problem.

Tip: If you follow the above method set without sound, pay attention to check the system tray has no volume icon. If not, turn on sound and audio device properties, and select put the volume icon in the taskbar so that there is a sound.