[LAU] Putting mono mp3 to CD

[lanas]

Folks,

  I record sketches using an IRiver mp2 player equipped with a mic.
This device yields mono mp3 files.  I convert them to wav using for
instance:

# mpg321 --wav VOICE0701_001.wav VOICE0701_001.MP3

  But then when I try to make a CD from these tracks, cdrecord
complains:

# cdrecord -pad -debug=3 -vvv dev=ATA:1,0,0 -eject -dao *.wav

"cdrecord: Inappropriate audio coding in 'VOICE0701_000.wav"

  What is the conversion recipe to put that type of files to a CD ?

Thanks.