L455-S5975 Itunes playback sounds sped up

Just got the L455 this week and the first app I installed was the latest version of Itunes.  Once I got all my music loaded into it,  I noticed the oddest thing.  All the songs sound like Alvin and the Chipmonks!  Everything sound sped up and at a higher pitch.  There are no settings in Itunes turned on (i.e. EQ, Crossfade,sound enhance) that would seem to affect this.  Couldn't find anything on the board either, so here we are.

I have a similar problem. I've owned the machine for just over a month and love it.
But now all sound coming out my L455-S5975 sounds like an echo chamber with the reverb cranked up.
The driver is up-to-date.
What could be the problem?

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