Hello, I have in my A3 the big Navi with SD slot which also plays MP3s. I notice that with some tracks completely the bass is missing although those come on the PC somewhat (I can set it). The car now has no equalizer in the sense. My question is now whether there is a program with which I can make the tracks a bit bass-loader. In principle I am looking for an adjustment of the sound curve. It would be nice if someone could comment on this.