Hi, I'm looking for some freeware software to reduce the volume of WAVs, so that the WAV file can be 50% as loud, 150% louder, etc. I don't need anything sophisticated - just a way to change the inherent volume of the WAV (for the purposes of balancing the volume of some of my sound effects with the volume of others). -Gauvir_Mucca

Audacity. Every hobby game developer should have it imho, since it is the best freeware audio editor that can be found.