If you have sound issues with other addons or sounds including GSX sounds, go into Windows sound settings (left click on your speaker icon and click “open sound settings”), scroll down toward the bottom and click “sound control panel” (will open a new window showing your installed sound devices), click on communications tab, select “do nothing” apply and ok. This is with windows 10. I don’t know why, but it seems every time I add something new to the sim, the sounds for addons drops drastically to where you can almost not hear it (Pro ATC X, GSX, my VA ACARS sounds all drop way down but still show max volume in the mixer). If you’ve done those steps above before and the sound drops down again, go back to that configuration tab, you’ll see it’s already set at “do nothing” but change it to “reduce by50%” apply that (you’ll hear sound coming back), then select “do nothing” again, apply and ok again. That seems to work for me until I add something else. Not sure if this is a windows issue or a P3D issue, but since it impacts programs aside from GSX, it is not a GSX issue.