Quote:
Originally Posted by Prodigy.
Does the ASD amplify the engine noise even at idle? Have noticed the engine is noisy in the cabin, in a bad rattly type of way.
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Technically, it doesn't ever amplify engine noise -- ASD augments the engine sound with artificially generated harmonic content to "fill in" the spectrum in a way that the engineers wanted.
http://www.bimmerfile.com/2015/02/04...-active-sound/
It never stops unless you have it disabled.