How do I convert a .asf file to .wav?
Using mplayer it is simple to convert an ASF file to MP3.
Ensure you have mplayer installed (On CentOS this would be "yum install mplayer").
mplayer infile.asf -vo null -ao pcm:waveheader:file=outfile.wav
This will then convert the audio file into a .wav for further processing, etc.