Convert WMA Into MP3 (free/no-installation)

      0. download and unpack these apps : MPlayer and lame
      1. Convert the WAV file by this command:
         mplayer -vo null -vc dummy -af resample=44100 -ao pcm "Song 1.wma"

2. convert into MP3 the result of step 1 (audiodump.wav).
lame audiodump.wav "Song 1.mp3"

3. delete large wav file created in step 1(audiodump.wav)