Convert files. wma to .Mp3 or .Flv

This task of conversion is very easy in Ubuntu.

Installing soundconverter
We're going to Applications -> Ubuntu Software Center and seek
Soundconverter. We installed.

Using soundconverter
We're going to Applications -> Sound & Video -> Sound Converter.
Edit -> Preferences set to our tastes and our needs, and ready. Add single files or entire folders and give it to convert.

I do not get the option to mp3
We have to go to System -> Administration -> Synaptic Package Manager and search for the package gstreamer0.10-plugins-ugly-multiverse
and install it. Once installed, reopen the soundconverter and preferences and we will go on mp3 option.

Easy and simple.