1. First, find the speaker icon in the notification area in the lower right corner of your win7 computer and right click, in the slide menu that appears, we choose to play the device.
2. In the sound window that opens, find the speaker options, then right-click and select Properties.
3. After that, you can see the window shown in the following figure, switch the interface to the advanced column, and then in the exclusive mode below, "Allow the application to monopolize the device" ” Check the option to remove it, then click OK to save the settings.
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Don't envy others, let you 3 seconds into a Win7 command master!