Choose 16 bit, 44100 Hz (CD Quality) from the dropdown and then click on Apply. Windows 10 Pro latest updated 1903 Nvidia 2080 GTX with 430.86 drivers, and Geforce Experience 3.19.0.107 Am experiencing this as well. Unfortunately, there is no fixed reason for our laptop speakers popping or crackling problems. Yes, it's the icon furthest to the right.
