Answer

Updating the lastest Audio driver and the Nahimic AP will resolve those issues.
In attached file, you can find the instructions of the operatiing. Please download the lastest Audio driver and Nahimic AP from product download page.

Models

Gaming 24 6QD, Nightblade MI2, Aegis Ti, Gaming 24 6QE, Nightblade MI2 (Barebone), Nightblade X2, Aegis X (Barebone), Nightblade X2 (Barebone), Aegis, Nightblade MI2C, Gaming 27 6QE, Nightblade X2B, Gaming 24 6QE 4K, Aegis X