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Open the Sound window and go to the Recording tab.
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In Windows 7, you can open this window by selecting the Recording Devices item in the menu that opens when you right-click the speaker icon. |
If there is no Stereo Mix device on the Recording tab, right-click any empty space in the list and select Show Disabled Devices.
If the Stereo Mix device is disabled, right-click it and select Enable.
Click the Apply button in the Sound window.
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