First download Wavosaur from the following link

the program doesn’t need installation and with it we can easily convert our recorded audio file for use in PBX.

  1. Open the file you want to edit.

2. Convert to mono from the following options:  Process -> Convert to mono -> left only

3.Change the sample rate to 8000 Hz from Process -> resample -> change to – 8000

4.change the bitrate to  16 bit  from : process->bit depth converter->change to->16

5. Normalise the volume to  +2 db,   from : process->normalize->custom->2

now save the file as wav. format.


  • in some cases Wavosaur for mp3 must include lame_enc.dll