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I spoke with a longtime BMW scientist that worked on cabin noise cancelling signals. He said that they've had active noise cancelling for quite a while. Is the ASD a culmination of very good noise cancelling requiring the necessity of piping in false sound to engage the user?
Further speculation is that programming out ASD would likely also eliminate the noise cancelling function. Do we know whether there is active noise cancellation, and if there is a way to keep it without the fake engine noise?
In my opinion noise cancellation would be a nice feature on long drives.
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