Linux Command Line Solution
You can also convert WMA to MP3 in the terminal, using the following commands. Make sure you’ve installed Lame and Mplayer before doing this.
Install them through Synaptic or as an alternative:
sudo apt-get install mplayer
sudo apt-get install lame
All wma’s should be in the Desktop folder.
Create a text file with Gedit, or another text file editor and name it “wmamp3 in ~/”
Copy and paste the following code:
#!/bin/bash
current_directory=$( pwd )
#remove spaces
for i in *.wma; do mv “$i” `echo $i | tr ‘ ‘ ‘_’`; done
#remove uppercase
for i in *.[Ww][Mm][Aa]; do mv “$i” `echo $i | tr ‘[A-Z]‘ ‘[a-z]‘`; done
#Rip with Mplayer / encode with LAME
for i in *.wma ; do mplayer -vo null -vc dummy -af resample=44100 -ao pcm -waveheader $i && lame -m s audiodump.wav -o $i; done
#convert file names
for i in *.wma; do mv “$i” “`basename “$i” .wma`.mp3″; done
rm audiodump.wav
Then, again in the terminal, enter
chmod +x ~/wmamp3
sudo cp ~/wmamp3 /usr/bin
Finally, when you type “wmamp3″ the conversion will take place. The process takes a few seconds, and it discards the original WMA and leaves only the MP3. The best part about this method is that it will work on multiple files, and if you change some of the coding and added codecs, it will work with other file types, too.
Software
Soundconverter is a download that works quickly. Download it through the package manager or by command line
sudo apt-get install soundconverter
Choose the file, choose “mp3″ in preferences, and then click convert. Audacity changes many files easily, but not WMA. The Audacity website says that a beta version will do it, but it hasn’t been released yet.
Soundconverter interface after installed, klik Add Files
Select the file(s)
Converting process is running
source : http://www.ehow.com/about_6193178_linux-wma-mp3-conversion.html
