Yeah, I did as much research as I could before hand, sorry to see that you're still having this problem seven months later. At least one other person has had this problem, but unfortunately his fix didn't work for me.
At this point, I simply don't use iTunes. If I want to listen to music while at my desk, I use my iPhone and Bluetooth speaker, don't use the computers speaker system. Quite a disappointing workaround.
I'm a little late to the party but hopefully someone who finds this in the future can use the help. I was having this problem for months and hating itunes. Then discovered it was the result of date plugins. Check this link, it will tell you exactly what to do.
If safe mode allows you to paly the songs then go here:
Once you remove the rouble plugin you'll be happy again.