For me the steps from this tutorial https://era86.github.io/2017/10/03/asus-zenbook-3-volume-controls.html have done the trick in order to control the internal speaker volume. But unfortunately it is more a workaround than a real fix since I still have crackling sound... :'(
For me the steps from this tutorial https:/ /era86. github. io/2017/ 10/03/asus- zenbook- 3-volume- controls. html have done the trick in order to control the internal speaker volume. But unfortunately it is more a workaround than a real fix since I still have crackling sound... :'(