The problem I have is our dispatch center has a recorder for their recorded lines that the codec is no longer in existance. I am impressed with AVS Audio Converter, nothing else converts the file. The wav file they email me to listen to had to be converted. I tried all the different conversions MP3, Wav, etc. I tried changing all the bit rates etc as well. Is there a way to slow it down so it doesn't sound like Alvin and the Chipmunks? Thank you.