Hello Everyone!
I have been tremendously frustrated by this problem for many hours since I got my new laptop yesterday, and I finally found the solution after trying and trying again these suggestions to no avail! I created a Microsoft account just so I could share this
solution with everyone who still has the problem despite trying everything other people have posted. I realize this conversation is from several years ago, but hopefully this solution works for a few more of you who still have the problem.
FYI I have a brand new Dell Inpiron 5521 with Realtek HD Audio sound card and Windows 7 (paid an extra 100 bucks to NOT get windows 8 :) )
The problem is such: a general compression on every sound the computer makes - ie, the louder sounds are made quieter and the quieter sounds are made louder - a horribly annoying feature which kills dynamics and makes listening to music a dreadful rollercoaster
of fluctuating volumes. This occurs with EVERY sound the computer makes - it is not limited to iTunes, or WMP, or whatever - it affects everything.
I tried all the suggestions here:
sound drivers are updated,
sound - communications - when windows detects communication activity - set to "do nothing"
sound - playback - speakers properties - enhancements - all boxes unchecked (and for some reason I do not have the mentioned "disable all sound effects" box
but none of these worked.
Then, after a much frustration, in the system tray (in the hidden icons no less) I found a sneaky **** of an icon: "Dell Audio." Opening this, i find a window with a completely different graphical interface (non-Windows) with several tabs and a few volume
sliders. In this window I see some kind of equalizer called "MaxxAudio4" and it is ON! I turn it off and the problem vanishes!!
So for me at least, the problem was not Windows 7, Realtek sound card, audio drivers, or Media Player, or whatever. It was DELL! I don't know what exactly this "Dell Audio" is - some kind of peripheral, additional audio control separate from Windows -
but the problem was here. I realize that not all of you have Dell computers, but for those who do, hopefully this solves your problem. For the rest, I would not be surprised if different manufacturers also included their own audio controls which you probably
weren't even aware existed - and perhaps these controls have built-in equalizers or compressors which cold cause a problem such as this.
I hope this information helps one of you who is still struggling with this problem!