wav_convert2mono   25 lib/wav.h      int wav_convert2mono(struct WAV*src, struct WAV*dest, int rate);
wav_convert2mono 1669 src/swfc.c             wav_convert2mono(&wav, &wav2, 44100);
wav_convert2mono  235 src/wav2swf.c      wav_convert2mono(&wav,&wav2, samplerate);