Note: Make sure the system drivers for these components are correctly installed.
1: Right-click the sound icon in the right of the taskbar.
1A: Select "Playback devices"
2: Now the Playback tab will open, automatically it is set as the "Intel SST Audio Device"
2A: Select the "Speakers"
option, click "Set Default"
Now you're set! now you can use application like skype