HI: Ron34
I use MPeg Suite to change wave file to MP3
I got this free from this site, it works
great, there are all kinds of stuff at this
site http://download.cnet.com/downloads/0-1857922.html?tag=dir

I record the Keyboard with tape deck
then connect tape deck to sound card of
computer, & use a program called Total
Recorder it is a share ware program cost $15
if you register it but you can try it out for
free.
You can find Total Recorder at www.totalrecorder.com

There are all kinds of software to do this,
but these are free or there about & they
work good.
Denny