Hi this contributions doesn't seem to work: https://www.pcgamingwiki.com/w/index.php?title=SWAT_4&type=revision&diff=433165&oldid=422937
The game seems to use Direct Sound only during the initial cutscenes, and then just uses OpenAL in-game. As this contribution relies on using Direct Sound, the suggested adjustments will have no effect. Did the author test the suggestions before submitting them? I tried to reproduce it on my own machine without success. I also inspected the original DefOpenAL.dll file that comes with the game, and it has no imports of "dsound.dll" what so ever.