To those who were interested in knowing more about how M Sound Control works after the BMW's OTA update. AutoTopNL released a POV drive video. And to AutoTopNL the valve flaps open up sooner and more linearly with the OTA update.
The update also changed the way the exhaust sounds when you let off the throttle. It ends with a base blow though the exhaust. Even with the OPF equipped because AutoTopNL had the pleasure to test drive BMW’s own M4 G82 with an update before the public release.
Please note that the exhaust is not stock, but with our full catted system. That's going to impact the sound volume and pops & bangs you're hearing. Thank you.