The sound engine I cooked for the PS2Doom port is officially available from http://code.google.com/p/cosmix/ along with a playable example I named JammerPS2.
JammerPS2 works like a sound sample trigger, using the Dualshock controller buttons to fire up sounds.
I decided to pack it with samples from the Cannon Fodder intro song for you to have something ready to play with, but you can supply your own samples, as long they are mono or stereo WAV files rated at 48000Hz (you may use any other sample rate, like the more usual 44100Hz but the sounds pitch will be higher than normal).
Get it from:
http://code.google.com/p/cosmix/downloads/list
Should be run of a USB pen/drive. Source is included of course.