MP3G is the newest format for karaoke music. There are 2 files stored on the disc, an MP3 file and a Graphics file. A MP3 is a compressed audio file. The graphics file is what you see on the screen. This format has the advantage of having a lot more songs on one disc compared to a CDG since MP3 files are a lot smaller than CDG files. This format will only play on MP3G players.