What is ASD in a BMW?
Active sound design (ASD) takes inputs from engine and vehicle speed, pedal input, exhaust noise, and vehicle vibrations to change the interior and exterior noise of the vehicle. In the HiFi system the Active Sound Design is installed between the Headunit/CIC and the audio amplifier AMPH. The Active Sound Design in the F10 M5 is woken up by the K-CAN2. The ASD System mixes the audio signals coming from the headunit and the corresponding vehicle-specific and engine-specific audio signal.