Right-click on the karaoke (.kar) file to convert to the midi format.
Select "Rename" from the context menu.
Type a new name plus the new extension of .mid between double quotes into the input box. For example, to name the new file type "New", type "new.mid" into the input box.
Click "OK" to save the new file name and extension. The file has now been converted to the midi format.
Test the file by playing in a compatible midi player.