My sound card is a Realtek HD Audio, built into the motherboard. I have two sound outputs - 5.1 audio in the rear of the case, and a stereo output in the front of the case which doesn't get used that much.

Lemmings Revolution plays FMV audio out the rear, and ingame audio out the front. If I hadn't happened to have headphones plugged into the front output, I would have thought ingame audio was just plain broken. If I set the front audio output to be my default sound device, then FMVs play audio out the front (silent if nothing happens to be plugged in there), and ingame audio plays out the rear.

Is there any way to fix the game so it outputs everything through the default sound device? If possible, I'd rather do something to alter the game than something to alter my system.