convert wma files to mp3 files

Is there an easy way to do this? Maybe with the standard Slack install :) I think VLC may do this but its kind of a pain to install with all the dependencies. I am slowly doing that on a, I hope 14.2 partition but that's going to take a while. I would like to be able to do a directory with sub directories from the command line. In other words convert all the wma files to mp3 files.

Is this possible?

I did some google searches and searched the forum here but did not really find what I wanted.