That was the control panel for my Asus DGX soundcard...I pipe the digital output to my DIY dac. I much prefer EasyQ over JRmedia...but those have to always be set and is not global for youtube etc, whereas the Asus control panel controls all the sound from the PC. I originally got the soundcard to muck around with Dolby HP...which is fantastic for youtube!
With digital EQ I found it necessary to reduce the sub-gain to 75 percent and set the bit depth to 24 bits...I don't hear anything wonky being introduced by the Asus EQ, after I reset the options and it set the sub gain to 75 percent. Before this I had it at 100 percent and the inbuilt clip limiter would go off making the sound wobble and I blamed the EQ, silly me.