So attached file below is My Fix to Enable EAX 3D Sound / Environmental Effects and 3D Bias in Diablo II / Warcraft III or maybe other games also.
I've tested IndirectSound v0.20, I cannot seems to Enable Environmental Effects in Diablo II. I've been keeping this files so I wanted to share it to all of you my 3D Sound Fix for Diablo II. Q>How to Enable Environmental Effects in Diablo II Enable EAX 3D Sound/Environmental Effects/3D Bias in Diablo II (2020 Other Method)