Super CD+G (SCDG) technology allows manufacturers to burn a CD with literally thousands of songs on one single disc. Manufacturers will be taking their multi-disc packs and placing the entire set on one disc. This is a huge advantage! You will no longer be swapping discs in and out to get your favorite songs. Each SCDG will come with a songbook. There will be a key number for each song. Place the disc in the player, select all your key numbers, play the sound tracks. At present, the CAVS 105G, 203G and 305G players are required to play this format.