On an Inspiron 5447 running Win 8.1, I hear a constant buzzing sound through the built-in speakers when stereo mix under volume mixer (or studio quality under speaker properties - advanced) is chosen as the sound option for the Realtek audio. The driver is up-to-date (6.0.1.7152) and all system updates are installed. I've run the windows audio troubleshooter, Dell hard drive diagnostics, and also then uninstalled the Dell system detect and system assist. Nothing worked. If I open volume mixer and turn Realtek stereo mix all the way down, I can listen to sound - but it is missing some dimensions. Neither the Dell site nor Realtek seems to have an answer for this - and most posts I see on this forum have to deal with headphone only problems. This is a speaker problem. Suggestions? Thank you!
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