Automatically adjusting audio levels

I recently got the hp dv6t 7000 quad edition (http://www.shopping.hp.com/en_US/home-office/-/products...)

And after about 3 days of use I realized that when I plug in my ATH AD7000 headphones that the sound level is adjusting to a constant level.

For instance if I turn up the volume slider all the way up in iTunes and then start playing a song everything is normal, but when i slide the iTunes slider down to a sliver next to being completely off at first the audio dips in the level of sound, but then returns to the same level! And when I start the song almost all the way down, first off it's pretty loud for being at 1-5% and second when I crank the slider all the way to 100% the volume goes up for a second, then returns to the same level of loudness (not the slider, the level of what I hear is what I'm talking about). But this isn't just iTunes, youtube and many other programs have this aswell. It's as if the volume sliders on programs have no effect!

I haven't noticed any abnormal changes in the audio levels (the numbers, but there must be a change of master volume or something somewhere that's keeping the audio level constant) of any program or control panel, yet it would seem like it would have to.


I'm asking this category because I honestly don't know where else to go for this weird problem and I think it has something to do with the Beats audio system and drivers that were installed on this laptop as I am also having issues with my Zalman external clip on mic (my friends tell me that I keep fading in and out like some spirit).


EDIT: I forgot to add but this problem only exists when I have the headphones plugged in, with my laptop speakers then the individual program volume sliders actually take effect.


And before anybody says it yes I set that windows call thingy in the sound control panel to "Do nothing"