Switch is a sound file format converter for Windows or Mac. Convert audio files from many different file formats into mp3, wav or wma. For example convert wav to mp3, mp3 to wav, wma to mp3 or many other formats. Just add the files you want to convert, select the output format, and then click convert.
"Please feel free to convert midi, mid or karaoke, kar, rmi files to an audio format (MP3, WAV, WMA) that you can burn to an audio CD. Press Browse button and select any your midi file (max size 15KB) then press Convert button. After few seconds your WMA, WAVE or MP3 file will be available for free download. "