Karaoke Vesion don't do Karaoke midi files, they do CD+G and mp3 mixer files only, I have a few of them to make audio pads, I wish they did.
I have thousands of cd+g Karaoke file and they will not play on the Genos, only the audio mp3 file. You need the Karaoke midi file to play full Karaoke, from the likes of Song Galaxy etc, but they are expensive each.