file extensions
 

after you download music.
how do change the file extension to an mp3 or a wma or wav
can anyone help
thanks if you can

You need an audio converter. I'm not sure why you'd want to change from mp3 to wma. Most players will play mp3. What is more, both mp3 & wma are highly compressed lossy formats. ie: in order to reduce the size so much, they throw away information about the song starting with the higher frequencies. So compressing it again will lose even more quality.

Audacity: http://audacity.sourceforge.net/download/mac will convert from mp3 to wav. It is free. But you'll need to downld several packages from that site so it all works properly.