I've been having this problem with my laptop every so often since I bought it. Sometimes when i'm listening to music or watching a video, the sound suddenly goes a lot quieter, probably about half the volume it was before. The volume level indicator in my status bar and settings don't change but it's just quieter than it was before. This has happened both on the external speakers or plugged in earphones. I have found no way of fixing it but it reverts back to normal after a while. It's very distracting and unpleasant when I have to turn the volume up during one of the quiet phases and get a fright when it suddenly fixes itself and goes louder again. Does anyone know what is causing this and how to fix it? Thanks in advance.
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