Small adjustment to reduce FPS stuttering and update sound playback.

battleMETAL

battleMETAL is a successor to the 90's mech games, a cross between the mech-piloting of Mechwarrior 2 and ferocity of Quake. Command a massive warmachine bristling with firepower as you blast through a war-torn world.

Seems like a few shaders were memory hogs, demanding too much gpu for minor benefits. I also found a better sound-playback function in the engine with a few more options. Net result is better sound mixing, and a little pitch-shifting to give some variety. ESR especially sounds better, and explosions now have some oomf to them.