On the test drive with the X5 M50i, I noticed it when accelerating. As if a sharp wind is blowing through a crack or something is hissing softly.
Now I have an X7 M50i, same background noise, clearly synthetic from the speakers in the "Sport" mode.
Does anyone know something about this? Am I right? Reason for this fake sound mixture? The 50i makes a very good impression even without artificial sound.