Okay, I’ve figured out how to get them in my map; I’ve made some 8-bit 44100 khz mono wavs, and put them in the appropriate folder. They DO play when I trigger them. However, they play in an EXTREMELY EAR-RAPEY fashion; they sound like a TV tuned to static. You can sort-of hear the actual sound behind it all, but it’s definitely hidden.
Here’s my map (Compiled for EP2, but it only uses tools textures, so it should work on basically any game). Don’t worry, it won’t ear-rape you when you load in, just be sure you turn down your volume a few notches before walking onto the raised keys (you’ll know them when you see them) http://dl.dropbox.com/u/734502/Keyboard_paked.bsp
And here’s one of the sound files; it plays just fine both in audio players, as well as they hammer “preview” http://dl.dropbox.com/u/734502/C4.wav
Thanks in advance for trying to help me.