"6thMix" was intended to be the Next Generation of Dance Dance Revolution. As such, there are many changes. First, the difficulty levels were renamed. 'Basic' was renamed 'Light', 'Trick' was named 'Standard', and 'Maniac' was named 'Heavy'. They are also given Japanese difficulty names in conjunction: 楽 ("raku"), 踊 ("you"), and 激 ("geki"), respectively. Their color codes—orange, fuchsia and green, respectively—remain the same. Also, all songs from previous versions have been removed in 6thMix (although the prototype version of this game had some songs from previous DDR versions), intending the game to start from scratch. Many past songs do return on 7thMix and later releases, however.