How to convert to mp3 files

I have read all the messages posted and I understand that they need to be mp3 formated to play on the shaker, which is just really a pain in the butt, but anyway can anyone give advice on how to convert to mp3 format. Right now they are in my music and window media player.

We spent hours last night with the same problem. If there’s a way to change the format of already ripped songs, we didn’t find it. I did though re-rip songs in a mp3 format in media player by pulling down the rip tab and changing format to mp3. YOu can then sync your shaker and drag the songs over to the sync list. My newly ripped songs now play on the shaker.