Bog,
Since I don't know your application, I could not test this
script -- see if it works for you:

#!/bin/bash

#Saves the current directory
mSaveDir=`pwd`

#Save the list of "ogg" and "wav" files
mListogg=""
mListmp3=""
for mFileName in $@
do
  j=`echo $mFileName | cut -f2 -d '.'` 
  if test $j = 'ogg' 
  then
    mListogg=${mListogg}" "$mFileName
  fi
  if test $j = 'mp3' 
  then
    mListmp3=${mListmp3}" "$mFileName
  fi
done

#make the "/tmp/cd_temp/" directory
mkdir /tmp/cd_temp

#go at the files directory
cd /tmp/cd_temp

#convert the ogg file in wav file 
for mFileName in ${mListogg}
do
  mBaseName=`basename $mFileName .ogg`
  mFullogg=$mSaveDir"/"$mBaseName".ogg"
  mFilewav=$mBaseName".wav"
  sox $mFullogg $mFilewav
done

#convert the mp3 file in wav file 
for mFileName in ${mListmp3}
do
  mBaseName=`basename $mFileName .mp3`
  mFullmp3=$mSaveDir"/"$mBaseName".mp3"
  mFilewav=$mBaseName".wav"
  mpg123 -w mFilewav ${mFullmp3}
done

#burn CD
cdrecord dev=ATA:0,0,0 -eject speed=2 -pad -audio *.wav

#erase the temporary file
rm -r /tmp/cd_temp/