I could not get rid of the noise while using text scrolling. Besides the blips during scroll, there are pops when you change from one input to another. Very unprofessional. But the worse offense for me was noticing how horrible the preamp is in the dice unit. All my high quality 256bit rate songs sounded terrible compared to my BMW AUX input.
Therefore, I returned my dice unit and bought a spec dock that charges the ipod and uses my BMW AUX input for audio input. It is not ideal as the iPod doesn't pause when you switch car off or switch to Radio.I have to reach to the iPhone and hit stop. But to me sound quality is far more important so this is my only solution I have found.