Editing Dance Dance Revolution (section)

===Groove Radar===
{{See also|DDRMAX Dance Dance Revolution 6thMix#Groove Radar}}

The foot-rating system was completely removed for the 6th Mix, and replaced by the ''Groove Radar''. The Groove Radar is a [[star plot|graphical representation]] of the difficulty of a song based in five different areas: Stream, Voltage, Air, Chaos, and Freeze.

*'' Stream'' – Indicates the overall density of the steps of the song. A high number of steps is a factor too, but not necessary for a high stream measurement.
*'' Voltage'' – Indicates the peak density of the steps (the highest density of arrows that ever appear on the screen at once). Songs with a high BPM (300 or more) usually have a high voltage measurement, since it allows more steps to appear in increasingly halved beats (8th step in a 300 BPM song equals to 4th beat step in a 150 BPM song, and so on), though songs with lower BPM can have a high voltage, even if the halved beats usually cap at 32nd beat (64th beat steps exist in very few songs).
*'' Chaos'' – Indicates "off-beat" steps; those that do not occur in 4th or 8th beats.
*'' Air'' – Indicates the number of double steps (i.e. jumps) and shock arrows within the song.
*'' Freeze'' – Indicates the number of freeze arrows within the song

Each game usually has a song that maxes out a category within the radar. If a song in a following mix or update has a higher category measurement, then the groove radar is renewed so the new song can max out that category, while all previous songs are re-rated in respect to the new radar.

As of ''[[Dance Dance Revolution (2013 video game)|DDR 2014]]'', the groove radar also employs a numerical measurement in addition to a graphical representation. Before the update, the radar did not disclose the number by default, though it could be shown by holding the SELECT button while heading to the song select screen.

The Groove Radar was not very popular among seasoned DDR veterans. The foot-rating system was restored to work with the Groove Radar in the [[DDRMAX Dance Dance Revolution|North American home version of the game]] and the next arcade version, ''[[DDRMAX2 Dance Dance Revolution 7thMix|MAX2]]'', and almost all future versions (except for versions based on the [[Dance Dance Revolution Extreme (North America)|North American version of ''EXTREME'']], which only used foot ratings). All of the ''MAX'' songs on ''MAX2'' received foot-ratings, excluding songs that were removed.

''SuperNOVA 2'' featured special edits of songs specifically meant to max out specific categories on the radar, culminating with "DEAD END ("GROOVE RADAR" Special)", maxing out all five categories. While not related, ''SuperNOVA 2'' also featured a variation known as "My Groove Radar" as part of e-Amusement, which was also divided into five categories, though it was meant to measure the player's stats on songs rather than showing the song's difficulty.

This feature is now removed in DDR WORLD.