 All record restoration applications for Windows work directly upon WAV files, but a few will also directly open files in other formats, such as MP3.Record restoration software normally handles 2 different categories of noise separately.First, there is the constant background noise that goes on through the entire recording that is the result of the sound the stylus makes in the groove when no music is playing, plus whatever subtle drones are generated by the electronics involved (such as turntable rumble or 50/60 cycle hum).