This supports any type of wave file (frequencies, channels and
 8, 16, 24 and 32 bits), automatic optimizations (DC bias adjust and
 normalization) and both WAV and raw PCM data.
 .
 The program has been successfully tested with many audio files and
 moreover with those highly dirt and damaged, for example recorded
 with a microphone in a room or at a very low volumes or with some
 noise.