Click the START button to convert the midi/kar files to mp3 format. If you are using the "Free Version" of Kanto Karaoke, the conversion will stop after 1 minute (only 1 minute will be converted to mp3 file). upon midi2mp3 a fantastic read Can you convert midi to mp3
Website URL: http://www.magicaudiotools.com/convert-midi-to-mp3