Loss of audio quality

I have the same issue - degraded audio because I cannot turn off the Compression option in SL, the dropdown is greyed out. Articulate's guidelines regarding how to avoid greyed out Compression dropdown include making sure the video is not edited in Storyline editor, that the publishing settings are right (e.g. using the Baseline profile) - but even after making sure that's all in order, the problem persist. I've seen some folks complain that it happens when you replace a video, and that's my experience too, so I don't do that anymore, but the problem is still there. I had this issue for a very long time, and it would usually go away if I deleted the video from SL and from my folder, closed SL, exported a video from my video producing tool (Camtasia) under a new name, and then inserting it back into SL. But not even that works anymore, I'm stuck and can't share my course with my stakeholders because it sounds bad.