What is beatmania IIDX

beatmania IIDX redirects here. For the first entry in the series, please see its seperate arcade page.

beatmania IIDX Series

A beatmania IIDX 5th style machine.

beatmania IIDX (alternately beatmaniaIIDX or just IIDX, pronounced "two dee-ecks") is a series of rhythm video games introduced by KONAMI in 1999. It is the direct sequel to the beatmania game series, and part of the BEMANI line of music games.

Cabinet information

beatmania IIDX's controller layout consists of seven keys (four white, three black) along with one turntable on each player's side. The turntable for the left player's side, 1Player, is on the left of the keys, while the one on the right player's side, 2Player, is on the right.

Under the 16:9 wide display are the start button, both effector and VEFX buttons, and effector sliders (or the touch screen in the LIGHTNING cabinets). After 9th style, there is also a cardreader in order to use the magnetic/contact-less smart card of e-AMUSEMENT. Each series produced has a different mix of new songs and older returning songs; starting with beatmania IIDX 11 IIDX RED, each style has also had a different graphical theme.

beatmania IIDX features quite a few differences from beatmania, including: two extra keys, full-motion video, more powerful hardware, wide-screen display, and more powerful speakers. Three different models of the cabinet exist: a more standard one called beatmania II (hence why a lot of older games' generic videos have "beatmania II" in their background videos), a more advanced one named beatmania IIDX, and a cabinet with two screens named LIGHTNING MODEL (released on December 16th, 2019). Eventually KONAMI discontinued support for the beatmania II cabs, with the IIDX and LIGHTNING MODEL versions becoming the standard.

As of beatmania IIDX 25 CANNON BALLERS, two built-in cameras for hand-shooting have been added: one on the metal cage in front of the neon lights pointing at the controls, and one to the left of the screen pointing at the player(s). Initially the game would not boot up if the cameras were not attached; this was eventually patched out.

Home versions

KONAMI has released 18 home versions of beatmania IIDX: 15 on the Sony PlayStation 2 game console, one on PC, and two on mobile devices. The PS2 games are stored on DVD, and can be bought with a controller that matches the arcade version very closely. The controller's key insert is detachable, so the player may attach it as preferred on the left or the right side of the turntable. 14 home versions, from 3rd style through 16 EMPRESS+PREMIUM BEST, were released in Japan between 2000-2009. The series' sole North American release, simply titled beatmania (2006), loosely uses 9th style CS as the source of its interface and system BGM, but contains a completely different songlist.

The latest non-mobile version, beatmania IIDX INFINITAS (2020), is a PC release of beatmania IIDX. It uses a unique interface based on SPADA.

Gameplay

Songs in beatmania IIDX are measured by a difficulty level system, which varies from game to game. Here's a list of difficulty levels by game for reference:

• beatmania IIDX→beatmania IIDX substream: 1-5
• beatmania IIDX 2nd style→beatmania IIDX 4th style: 1-7
• beatmania IIDX 5th style→beatmania IIDX 10th style: 1-7+ (8 in 10th style)
• beatmania IIDX 11 IIDX RED: 1-8+
• beatmania IIDX 12 HAPPY SKY→present: 1-12

The gameplay is still the same as in beatmania, with the addition of two extra keys. There are eight columns on the screen, corresponding to each of the keys and the turntable. While playing, small horizontal bars fall down these columns, and the player must press the right key corresponding to the lane as it reaches the red line. Keys 1, 3, 5, and 7 are white, 2, 4, and 6 are blue, and the scratch lane is red. Every time a key is pressed or the scratch is played, an instrument is played to complement the song. In order to hear the song correctly, the player must get the bars on the right timing. Depending on how accurate you hit the note, you will receive a rating of your performance in real time above that note, going from GREAT (a flashing one, officially known as JUST GREAT or PERFECT GREAT, meaning perfect timing; a regular GREAT meaning very close), GOOD, BAD, and POOR (the latter for not hitting a note at all).

The typical goal of the game is to clear the song by getting the Groove Gauge to 80% by song's end; clearing a song at exactly 80% is known as a "borderline". The gauge starts at 22%, and increases/decreases depending on your performance in a song. GREATs will increase the gauge quickly, GOODs will slowly increase it, BADs will decrease it slightly, and POOR will decrease it significantly. The lowest you can go on the gauge is 2%. However, depending on the game mode, gauge requirements can change, as explained below.

From beatmania IIDX 6th style onward, you will also receive a grade at song's end, pass or fail. Grade level is determined by EX-SCORE. EX-SCORE is measured by the amount of GREATs (just and regular) obtained in a song divided by two: two points for a PERFECT GREAT, one for a regular GREAT, and zero for everything else. You will also receive a letter grade, depending on your percentage of EX-SCORE:

• F: anything lower than 2/9
• E: 2/9
• D: 3/9
• C: 4/9
• B: 5/9
• A: 6/9
• AA: 7/9
• AAA: 8/9 and higher

There is no specific grade for achieving 100% EX-SCORE.

Clear Lamps

When playing on an e-amusement account, or on any console game/beatmania IIDX ULTIMATE MOBILE, the game will record your scores and clear status on each song. This will be shown on the song select screen as a glowing light next to the song's title, known as a clear lamp.

Clear lamps will glow depending on the best result you obtained playing that particular song.

Clear lamp	HEROIC VERSE - present	ULTIMATE MOBILE	Earlier versions	Info
NO PLAY	No light			The song has not yet been played.
FAILED	Flickering red	Flickering blue	Flickering Green/blue/yellow/red (BEGINNER, NORMAL, HYPER, and ANOTHER respectively)	The song was played, but failed.
ASSIST CLEAR	Bright purple			The song was passed with any ASSIST modifier or the ASSISTED EASY groove gauge setting.
EASY CLEAR	Bright green			The song was passed using the EASY groove gauge setting.
CLEARED	Bright blue		Bright green/blue/yellow/red (BEGINNER, NORMAL, HYPER, and ANOTHER respectively)	The song was cleared without any extra settings.
HARD CLEAR	White			The song was passed using the HARD groove gauge setting.
EX-HARD CLEAR	Flashing red and yellow			The song was passed using the EX-HARD groove gauge setting.
FULL COMBO	Strobing white, blue, and orange			FULL COMBO obtained on the song.

Difficulties

BEGINNER

This difficulty was added as a game mode in 9th style (5th style CS for home version). Designed for newcomers to the game, the BEGINNER difficulty uses alternative note charts that are rated from levels 1 to 3. Not all songs have BEGINNER charts.

Prior to copula, BEGINNER MODE was separate from the rest of the game modes. As of HEROIC VERSE, BEGINNER charts can now appear in level folders and select Dan courses.

NORMAL / LIGHT7

A degree of difficulty lower than HYPER. Was named LIGHT7 prior to HAPPY SKY. Near every song since 3rd style has a NORMAL chart.

HYPER / 7KEYS

This is the standard difficulty. Was named 7KEYS prior to HAPPY SKY. All songs have HYPER charts.

ANOTHER

The highest difficulty, ANOTHER charts range from as low as level 3 to as high as level 12, the maximum level. ANOTHER charts are near always more difficult than HYPER; even simple songs on HYPER can become notoriously difficult on ANOTHER. Prior to HAPPY SKY, ANOTHER charts were chosen in arcade installment by pressing the VEFX button when choosing a song. Also prior to HAPPY SKY, ANOTHER charts did not have individual ratings; they displayed the same difficulty level as their 7/14KEYS counterpart instead. Not all songs have ANOTHER charts.

LEGGENDARIA

LEGGENDARIA charts debuted in SPADA and cost 4 V-Discs (or one on certain days) to play. These are generally harder versions of ANOTHER charts or ported versions of Black ANOTHER charts from CS versions. Before HEROIC VERSE, LEGGENDARIA charts had a "†" or "†LEGGENDARIA" moniker after the song title and were displayed as separate songs. Not every song has a LEGGENDARIA chart, and some songs have only either Single or Double LEGGENDARIA charts.

Note that some tracks have certain charts that sound different from the original song.

Game modes

Note: These are the default settings for each mode. They might be changed by the arcade operator.

Mode	Duration	Repeat songs	Hidden mode	Switch Single/Double	Comments
STEP UP	3 songs	Yes	No	Yes	This mode gives the player a song list depending on their performance on each stage, with the range of difficulty becoming easier or harder. Three songs are guaranteed as well. STEP UP is unavailable for two players.
STANDARD (Asian/Korean cabinets, or earlier versions)	Up to 3 songs, plus EXTRA STAGE	No	No	Yes	Select a song per stage and try to clear it. Some versions may also include ONE MORE EXTRA STAGE.
STANDARD (Japanese cabinets)	Up to 3 songs	No	No	Yes	EXTRA STAGE is not accessible in this mode.
PREMIUM (Japanese cabinets)	Up to 3 songs, plus EXTRA STAGE	No	No	Yes	Like STANDARD mode, but requires PASELI. Accessing PREMIUM in all modes, except PREMIUM FREE, adds 7 V-Discs to the account.
EXPERT	Up to 4 songs	N/A	No	No	Play a course of set songs in a row without stopping. Players start with a gauge at 100%; if it drops to 0%, the game is over. It uses the HARD gauge, but it drops at a much slower rate. Up through Lincle, EXPERT courses had five songs, instead of the now standard four.
FREE	2 songs (3, if there are two players)	Yes	No	Yes	Like STANDARD mode, except that players can play to the end of a song without failing, and there's no level restriction.
TIME FREE / PREMIUM FREE	5 minutes (7 for 2 players and 6-30 in PREMIUM FREE)	Yes	No	Yes	TIME FREE is only available certain days, replacing FREE mode, or if online ARENA MODE only detects CPU players. It works like FREE mode, except with a timer instead of stages. PREMIUM FREE is only available in Japanese cabinets, requires PASELI and, on certain days, adds an additional minute.
HAZARD	4 songs	Yes	Yes	Yes	Added in EMPRESS, the GROOVE GAUGE turns yellow, and breaking combo will result in instant stage failure. A POOR with no notes on its line will drop the gauge by a minimal amount (2%).
TIME HAZARD	8 minutes	Yes	Yes	Yes	Like HAZARD mode, except with a timer instead of stages. Only available on certain days, replacing HAZARD.
TIME HELL	8 minutes	Yes	Yes	Yes	Like TIME FREE mode, except that the Groove Gauge cannot be recovered while playing. Only available on certain days, replacing HAZARD.
CLASS / DAN	Up to 4 songs	N/A	No	Yes	This is basically the same as EXPERT, but only HI-SPEED, EX GAUGE (yellow lines) and MIRROR can be chosen. Each course has up to four songs. The song sets differ for every difficulty.
ARENA	4 songs	N/A	No	No	An online matching mode where four players compete against each other on a four song set. If only CPU players are detected, the player can choose TIME FREE instead. ARENA is unavailable for two players.

HAZARD, TIME HAZARD and TIME HELL are available by highlighting (TIME) FREE mode and pressing the three black keys.

The availability of the modes is the following:

Country/Game	Cabinet Version	Availability
		STEP UP	STANDARD (songs)	PREMIUM	EXPERT/CLASS	FREE (songs)	TIME FREE (time)	Hidden modes	PREMIUM FREE	ARENA
Japan	Japanese	Yes	3 songs	PASELI only	Yes	2 songs (3 for 2 players)	5 minutes (7 for 2 players)	Yes	PASELI only	Yes
Korea	Korean	Yes	3 songs + 1	No	Yes	2 songs (3 for 2 players)	5 minutes (7 for 2 players)	Yes	No	Yes
North America	※U.S.	Yes	3 songs + 1	No	Yes	2 songs (3 for 2 players)	5 minutes (7 for 2 players)	Yes	No	Yes
Other	Asian	Yes	3 songs + 1	No	Yes	2 songs (3 for 2 players)	5 minutes (7 for 2 players)	Yes	No	Yes
EVENT MODE	N/A	No	No	No	No	Set in operator menu	No	Yes	No	Local Match only
Home versions	N/A	No	3 songs + 1	No	Yes	Infinite	No	HAZARD only	No	No
INFINITAS	N/A	No	No	No	CLASS only	Infinite	No	No	No	No
ULTIMATE MOBILE	N/A	No	No	No	No	Infinite	No	No	No	No

※LIGHTNING MODEL cabinets only. Older cabinets use the Japanese release.

Gameplay modifiers

[NOTE: Due to the sheer number of modifiers available in beatmania IIDX, this section will divide the modifiers according to the category that each is placed in-game (as of CastHour). Older modifiers no longer seen in recent arcade games are also described here.]

BASIC ASSIST MODIFIERS / Beginner Options

From tricoro onwards, these modifiers are displayed first for guest players or new e-amusement pass users. Beginning with BISTROVER, this screen can also be disabled in the e-amusement website.

• HI-SPEED - change the Hi-Speed value. (see below)
• ASSISTED EASY - a variation of the EASY gauge (see below). This lowers the Groove Gauge passing requirement from 80% to 60%. Introduced in copula.
• AUTO-SCRATCH - When enabled, this automatically plays all scratch notes in a chart.
• LEGACY NOTE - Introduced in SIRIUS, this converts all Charge Notes, Backspin Scratches and Multi Spin Scratches into regular notes. (Using LEGACY on a chart that does not contain said notes will be awarded as a CLEAR rather than ASSIST CLEAR.)

STANDARD OPTIONS / Game Options

From tricoro onwards, this can be accessed by pressing the EFFECT button while on the Beginner Options screen.

STYLE MODIFIERS / Note Chart Position

Modifier	All modes	CLASS only	Info
OFF	Yes	Yes	Default notechart position.
RANDOM	Yes	No	Each column of notes is assigned to a random key. Scratch notes are unaffected, however.
S-RANDOM	Yes	No	Same as above, but individual notes are scrambled instead.
R-RANDOM	Yes	No	Measures of notes are frequently rotated.
MIRROR	Yes	Yes	The notechart is flipped horizontally.

GAUGE MODIFIERS / Groove Gauge Reduction

Modifier	STANDARD / FREE / STEP UP	EXPERT / CLASS	(TIME) HAZARD	TIME HELL	ARENA	INFINITAS (2015)	Info
OFF	Yes	Yes	No	No	Yes	Yes	Normal Groove Gauge.
ASSISTED EASY	Yes	No	No	No	Yes	No	See above.
EASY	Yes	No	No	No	Yes	Yes	The Groove Gauge refills faster and depletes slower. Same passing requirement as the normal gauge.
HARD	Yes	Yes (EXPERT)	No	Yes	Yes	Yes	The Groove Gauge starts at 100%. POORs/BADs deplete much faster, and the song is failed instantly at 0%. All lines turn red.
EX-HARD	Yes	Yes (EXPERT)	No	Yes	Yes	Yes	Same as HARD, but with a greater penalty on missed notes, roughly 16% for each miss. All lines turn yellow.

ASSIST MODIFIERS / Assisted Play Feature

• This includes the AUTO-SCRATCH and LEGACY NOTE modifiers, which can be enabled individually or in unison, but are disabled in CLASS mode.

RANGE MODIFIERS / Note Chart Display Area

Modifier	Info
OFF	Notes are fully visible.
SUDDEN+	A lane cover is placed at the top of the screen. To adjust the range, hold the START button then turn the turntable in the corresponding direction.
HIDDEN+	A lane cover is placed at the bottom of the screen. Adjusting method is the same as SUDDEN+.
SUD+ & HID+	Combines the last two modifiers. The shutter window can be adjusted in the same fashion as the individual modifiers.
LIFT	This moves the judgment line up the screen.
LIFT & SUD+	Combines the LIFT and SUDDEN+ modifiers.

ADVANCED OPTIONS

From tricoro onwards, this can be accessed by pressing the VEFX button while on the Game Options screen.

Options	Arcade	Console / INFINITAS	ULTIMATE MOBILE	Info
Ghost Score Display Position	Yes	Yes	No	This enables a display of the difference between the current score and a previous high score as well as the position of the number in the gameplay screen. The color of the ghost display can also be changed.
Judge Mode	Yes	Yes	No	When enabled, this displays a small table counting the number of judgments (PGREAT, GREAT, GOOD, BAD, POOR, COMBO BREAK, and FAST/SLOW) obtained in a current stage.
Judgment Name Display	Yes	Yes	No	This adjusts the distance of the judgment name from the judgment line.
Judgment Timing Indicator Display	Yes	Yes	Yes	When enabled, this shows the FAST/SLOW indicator as well as the position of said indicator.
Timing Adjustment	Yes	Yes	Yes	This sets the delay offset between the screen visuals and player's input for better accuracy and/or to suit a player's preference. In CastHour, this can be set during gameplay by pressing [3] for EARLY, [9] for LATE, and [0] for AUTO-ADJUST.
Target Score Display	Yes	Yes	No	If a TARGET SCORE is enabled, this changes the display method of the target score difference.
Auto-Scratch Note Display	Yes	No	No	Shows or hides scratch notes if AUTO-SCRATCH is used.
Groove Gauge Display	Yes	No	No	Shows or hides the Groove Gauge bar and/or percentage number.
Lane Brightness	Yes	No	No	Adjusts the opacity of the player's note lanes.
Display	Yes	Yes	No	Changes the display method of the footage recorded from a cabinet's built-in cameras (if applicable) or video (for CS releases) in-game.

Pacemaker Graph Options

The following options can be toggled on the Game Options screen by turning the turntable. Most options are enabled when an e-amusement pass is used, unless otherwise stated. Note that Pacemaker Graph is unavailable when playing on two players, or on ARENA and BPL BATTLE modes (which used their respective graphs, as stated below).

Name	Info	Remarks
No Display	The graph will not appear during gameplay.	Default option. Can be used without an e-amusement.
Personal Best	The graph will display only the personal best score.	Personal best score displays in a green bar. Target scores displays in red will not appear. If the song is played for the first time, the graph will not appear and the score is displayed as 0.
National Best	The graph will display the best score across the world (and the identity of the player).
National Average	The graph will display the average score calculated by all the players across the world.
Prefecture Best	Similar to National Best, but displays the best score across the own player's prefecture (and the identity of the player).
Prefecture Average	Similar to National Average, but displays the average score calculated by all the players from the player's prefecture.
Dan/Class Best	Similar to National Best, but displays the best score from the same class as the player (and the identity of the player).
Dan/Class Average	Similar to National Average, but displays the average score calculated by all the players from the same class as the player.
Rival Name	The graph will display the selected rival's score.	Up to five rivals can be registered. A minimum of one rival must be registered to make it appear.
Rival Next	The graph will display a score of the rival above the player.	Up to five rivals can be registered. A minimum of two rivals must be registered to make it appear.
Rival Best	Similar to National Best, but displays the best score from the registered rivals.	Up to five rivals can be registered. A minimum of two rivals must be registered to make it appear.
Rival Average	Similar to National Average, but displays the average score calculated by the registered rivals.	Up to five rivals can be registered. A minimum of two rivals must be registered to make it appear.
Rival Rotate	Start with a score target from the lowest and shift to the next highest score.	Up to five rivals can be registered. A minimum of two rivals must be registered to make it appear.
Store Best	Similar to National Best, but displays the best score from the store itself.
Store Average	Similar to National Average, but displays the average score calculated by all the plays from the store itself.
Pacemaker AAA	Displays a target of DJ LEVEL AAA, with the score showing the minimum score required to get a DJ LEVEL AAA.	If the song have no plays, it is switched to this graph instead.
Pacemaker AA	Similar to Pacemaker AAA, but displays a graph/minimum score for DJ LEVEL AA.
Pacemaker A	Similar to Pacemaker AAA, but displays a graph/minimum score for DJ LEVEL A.
Pacemaker Percent	Similar to Pacemaker AAA, but displays a graph/minimum score set by a percentage.	Can be set by using a keypad, and then pressing the 00 button will set the percentage.
Pacemaker Next	Similar to Pacemaker AAA, but displays a graph/minimum score determined by cutoff of the player's best score.	The graph may display a + (located between the two levels) in the graph, with a minimum of A to AUTO (the maximum possible score)
Pacemaker Next+	Similar to Pacemaker Next, but displays a more precise level.
Pacemaker Rotate	Similar to Rival Rotate, but with minimum scores starting from DJ LEVEL A.
Previous Score Ghost	Displays the player's best score from the previous game.	Option is not available if PASELI Premium Play is not selected (when playing on Japanese Cabinets only).
Arena Score	Displays a real-time graph of all four players playing the song at the same time. The Target Score displays the player currently on lead.	Exclusive to ARENA mode.
BPL Battle Score	Similar to Arena Score, but displays a real-time graph of the rival players playing the song at the same time. The Target Score displays the player currently on lead.	Exclusive to BPL Battle mode.
BPL Virtual	Similar to Arena Score, but displays a real-time graph of both the player and the two participating players playing the assigned song at the same time.	Exclusive to LIGHTNING MODEL cabinets only.

• By pressing 1 on the keypad, the graph will display Tsujigiri Battle. This displays each of the store from all the players one by one as scores are beaten progressively.
• By pressing 2 on the keypad, a "SUB" option will display to set a secondary target score. The graph will not be visible but instead displays a secondary score below the target.

EXTRA OPTIONS

The following options can be enabled by using the numerical keypad installed in e-amusement connected cabinets. Note that, with the exception of M-RAN, enabling any of these modifiers will neither save any scores nor clear lamps, but EXTRA STAGE, Tran Medals, and in-game currency are still obtainable.

• M-RAN [6] - If on 2-Player Mode, both sides' charts receive the same RANDOM note column order. However, the 2P side's chart is also mirrored.
• BATTLE [7] - If on Double Play, this uses the Single Play notecharts instead on both sides. Two other RANDOM modifiers, SYNCHRONISE RANDOM and SYMMETRY RANDOM will be added as options.
• H-RAN (SAMURAI S-RANDOM) [8] - Same as S-RANDOM, but repeat notes on the same key are less likely to occur.
• EXPAND-JUDGE [9] - Introduced in PENDUAL. When enabled, the timing windows for PERFECT GREATS and GREATS are quadrupled.

Premium Area Modifiers:

These options are exclusive to LIGHTNING MODEL cabinets. Options and selections shown in the front page are explained in clockwise order starting from the top left.

LIGHTNING MODEL

Option	Info
Keypad	Displays a numeric keypad (replacing physical ones from older cabinets). Touching the X closes it.
Concentration Mode	If enabled, the Premium Area will turn black during gameplay. Touching anywhere will disable it.
Song searching	Allows to search for a list of (and any artist composed) songs input by the player. A memo option next to it allowed the player to mark their favorite entries, similar to MY FAVOURITES.
Song memo	Displays a list of songs saved/marked by the player. Up to 30 entries can be saved.
Play analyze	Displays a more statistical result screen of a song's performance.
News	Display any breaking news and Tsujigiri Battle. Any breaking news from the news ticker on the song selection screen are archived there and also includes a button that jumps the cursor to the relevant song. The Tsujigiri Battle tab shows the number of players defeated using the feature, with separate totals for Single and Double play.
Sound	Adjust the sound settings and the effect sliders, along with added two new EQ sliders, Lower-Mid EQ and Hi-Mid EQ.
Setting	Adjust the turntable resistance and toggling the lighting of cabinets.
Video	Allows the player to record a full-run footage of a song gameplay. (Japanese cabinets only; not all songs allowed video recording)
Random Lane Gacha	Allows purchasing of Random patterns and customizing a pre-set pattern. (Japanese cabinets only)
Hit chart	Display a list of the songs chosen the most frequent, by National, storewide, all-time, monthly and weekly.

Other Modifiers:

• HI-SPEED - increases the scroll rate of the note chart. The actual notes do not have to be pressed any more quickly; the scroll speed is simply increased, and the notes become further apart. Most versions of beatmania IIDX have more than one Hi-Speed setting, differentiated by numbers (a higher number means a faster speed.) The Hi-Speed modifier is traditionally abbreviated HS with the number immediately following. For example, Hi-Speed 2 is abbreviated HS2. From beatmania IIDX DistorteD 11 IIDX RED CS in the arcade and consoles respectively onward, HI-SPEED can be changed in-game. .5 mods were added in HAPPY SKY and 10th style CS for arcade and home respectively. Starting with tricoro, the HI-SPEED settings go from x0.50 to x4.00 in 0.25 increments. Since SPADA, the HI-SPEED setting can only be changed on the main gameplay screen. Rootage introduced a new HI-SPEED system, temporally replacing the old one. There are 10 HI-SPEED settings, and the chart will now scroll at the same speed on a given HI-SPEED setting regardless of the song BPM, but BPM changes will still affect the scroll speed. HEROIC VERSE re-enables CLASSIC HI-SPEED and expands Rootage's HI-SPEED option to 20 settings.

Hi-Speed is traditionally adjusted by holding the START button during gameplay and hitting either a black or white key. tricoro introduces the Floating Hi-Speed, in which adjustments are done by one-hundredth decimal intervals by spinning the turntable in a corresponding direction. A player can switch between the classic, Rootage and Floating Hi-Speed by pressing the EFFECT button or [0] on the keypad while the Hi-Speed window is open.

• TARGET SCORE - Adjust the graphs mode with a turntable. Unavailable when two people play. ARENA target score is exclusive in ARENA mode.
• RANDOM+ - introduced in IIDX RED and 8th style CS, this is similar to RANDOM, except that the scratch column is included in the randomization process, so the scratches usually end up assigned to a key, and a key gets assigned to the scratch. Scores don't save when this is on.
• MIRROR+ - introduced in 9th style CS, this is like MIRROR, except the scratch column is included. Scores don't save when this is on.
• SUDDEN (old) - notes only become visible when they enter the lower portion of the screen. The visible portion is approximately a third of the screen. It can be enabled at the same time as HIDDEN, causing the notes to briefly blink in the middle of their respective lanes.
• HIDDEN (old) - notes are only visible in the upper portion of the screen (again, approximately a third of the screen). It can be enabled at the same time as SUDDEN, causing the notes to briefly blink in the middle of their respective lanes.
• REGUL-SPEED - Introduced as a secret modifier in GOLD, this negates the effect of tempo changes by setting the scroll speed to a constant 150 BPM. The player can then select an appropriate Hi-Speed mod accordingly. To enable this option, open the options menu by holding Start and press the keys "2-3-5-7-4-6". Scores obtained using this modifier are not recorded.
• 5-KEYS - This assist modifier disables the two farthermost keys of the player's side, thus essentially making it a 5-key chart akin to the original beatmania. Removed in Rootage.
• ASSIST NOTES / MOBILE ASSIST - reduces chords to one or two simultaneous note(s). Exclusive to ULTIMATE MOBILE, using this option counts as an ASSIST CLEAR.