Hi there. I just bought a virtual 7.1 surround pair of headphones. They seem to work properly with other games, but I can't seem to make them work in Heretic. I tried the OpenAL driver, but the sound is just stereo. It is 3d, you can hear from right to left properly, according to where the sound comes from, but I'd like to play in 7.1 surround, or at least, in 5.1. How do I set up the audio? I'm using stable version 1.15.8 .