This software feels off. I install it, activate it and it indeed sounds nice, boost the bass a bit and enjoy if for a while. I turn it off and my headphones sound completely different, wrong even. However I uninstalled it without turning off the music and when the headphones return to "normal," zero processing, the sound is no where near as bad as when Tru-fi was installed and turned off. It feels as if when turning off Tru-fi while installed, still adds some processing. Removing it completely makes the headphones sound nice again, I tried True-fi and went back to Apo Equalizer, get the same results without that feeling that something is off.