ASUS UX52V turning itself down when the bass kicks in

[Dangerous_Dave]

I'm trying to figure out why my ASUS UX52V turns itself down markedly when the bass kicks in. It's almost as though the driver is capping the power level to the speakers. I've installed what I believe is the latest Realtek driver for the machine. Anyone know what might be going wrong here?

 

[icraft]

It could be that the power level is actually limited, or maybe a 'bass boost' feature is ducking the higher audio to create that effect?