Wolfenstein 3D supports positional stereo sound effects. For example, if an enemy is to your left, you will hear him from the left speaker. If he is on your right, then from the right speaker, and in front from both speakers. The stereo effects work with sbtype sb16 but not sbpro1 or sbpro2. On my 486 with a real Sound Blaster Pro 1.0, the stereo effects work. I used Wolfenstein 3D v1.4 Registered Version in both DOSBox and on the real hardware. Tested with .74 and Yhkowng's latest SVN.

Note that the stereo effects will only work with the digitized sound effects, not the FM sound effects.