Who composed the maimai song [X]?

[X] was composed by Blacklolita, a Fukuoka-based trackmaker and DJ known for dubstep and the self-coined 'Neo Digital Future' genre.

What does the title [X] mean and how is it pronounced?

The title [X] is leet (1337) notation for the infinity symbol ∞. The composer confirmed the reading as 'Infinity'.

What BPM does [X] have and does it change during the song?

[X] begins at 162 BPM, accelerates to 172 BPM during the buildup, and reaches 180 BPM for the final chorus, making it the first Perfect Challenge unlock song with BPM changes.

What difficulty level is the MASTER chart of [X]?

The MASTER chart is rated 13+ with a level constant of 13.7 as of PRiSM. It was originally rated level 14 in FESTiVAL and FESTiVAL PLUS before being demoted to 13+ in BUDDiES.

Who designed the charts for [X] in maimai?

The EXPERT chart was designed by Jack, and the MASTER chart was designed by 翠楼屋 (Suirouya).

How was [X] unlocked in maimai DX FESTiVAL?

[X] was unlocked by clearing a Perfect Challenge after reaching 700 km total distance in the Happy Fes Area. Starting from maimai DX BUDDiES, it became available by default.

Does [X] appear in other rhythm games?

Yes, [X] also appears in lowiro's Arcaea.

[X] (インフィニティ), Blacklolita | maimai DX FESTiVAL Song

All songs

Overview

[X] (read as "Infinity") is a maimai original composition by Blacklolita, introduced in maimai でらっくす FESTiVAL on September 15, 2022. The track is written in Blacklolita's self-proclaimed genre Neo Digital Future, a style he also applied to his CHUNITHM commission [CRYSTAL_ACCESS] and his beatmania IIDX contribution Advent Infamous. The title [X] is a leet-speak rendering of the infinity symbol (∞), and the song is sorted under "I" in maimai's in-game alphabetical listing as a result. The composition features three distinct tempo phases, opening at 162 BPM, accelerating to 172 during the buildup, and locking to 180 BPM for the final chorus, making it the first Perfect Challenge unlock song in maimai history to incorporate BPM variation. The song's MASTER chart, designed by 翠楼屋 (Suirouya), originally launched at level 14 before being re-evaluated to 13+ in BUDDiES and later settling at a 13.7 constant in PRiSM. A notable quirk of the chart is its total note count of exactly 999, one short of a round 1000. [X] also appears in the rhythm game Arcaea under lowiro's catalog.

Videos

Official PV

Open

Master chart

Open

Expert chart

Open

Charts

DX

BASIC

5(5)

201 notesDesigner: -|Tap 134Hold 12Slide 9Touch 20Break 26

YouTube

ADVANCED

8(8)

364 notesDesigner: -|Tap 267Hold 48Slide 18Touch 23Break 8

YouTube

EXPERT

12(12)

633 notesDesigner: Jack|Tap 444Hold 68Slide 54Touch 57Break 10

YouTube

MASTER

13+(13.7)

999 notesDesigner: 翠楼屋|Tap 628Hold 62Slide 109Touch 111Break 89

YouTube

Trivia

The song title [X] is written in leet (elite/1337) notation, the square brackets and the 'X' visually approximate the infinity symbol ∞. Composer Blacklolita confirmed the reading as 'Infinity' in a Twitter post.
In maimai's alphabetical song sort, [X] is treated as 'Infinity' and placed in the FGHIJ folder.
Blacklolita, based in Kokura, Fukuoka, is a dubstep-focused trackmaker and DJ who joined the Diverse System label on October 24, 2022.
The genre 'Neo Digital Future' is a label coined by Blacklolita himself. He has used it for multiple rhythm-game commissions across different franchises.
The song's MASTER chart has exactly 999 total notes, the Tap count alone is 628, giving it one of the higher Tap densities among FESTiVAL-era 13+ charts.
The MASTER chart features a broken octagram (eight-pointed star) slide pattern that appears three times during the early-drop section.
The EXPERT chart includes slide formations that trace an '∞' character shape at the very beginning and again just before the buildup.
[X] was originally unlockable via Perfect Challenge in the Happy Fes Area of maimai DX FESTiVAL, requiring 700 km of area progress. It became available by default starting in maimai DX BUDDiES.
The MASTER chart was originally rated level 14 from FESTiVAL through FESTiVAL PLUS. It was demoted to 13+ in BUDDiES, with its constant adjusting from 13.9 to 13.7 by PRiSM.
An extended version of [X] appears on the maimai でらっくすグッズキャンペーンDiSC -BUDDiES- and the maimai でらっくすベストアルバムちほー3 soundtrack.

FAQ

Who composed the maimai song [X]?: [X] was composed by Blacklolita, a Fukuoka-based trackmaker and DJ known for dubstep and the self-coined 'Neo Digital Future' genre.
What does the title [X] mean and how is it pronounced?: The title [X] is leet (1337) notation for the infinity symbol ∞. The composer confirmed the reading as 'Infinity'.
What BPM does [X] have and does it change during the song?: [X] begins at 162 BPM, accelerates to 172 BPM during the buildup, and reaches 180 BPM for the final chorus, making it the first Perfect Challenge unlock song with BPM changes.
What difficulty level is the MASTER chart of [X]?: The MASTER chart is rated 13+ with a level constant of 13.7 as of PRiSM. It was originally rated level 14 in FESTiVAL and FESTiVAL PLUS before being demoted to 13+ in BUDDiES.
Who designed the charts for [X] in maimai?: The EXPERT chart was designed by Jack, and the MASTER chart was designed by 翠楼屋 (Suirouya).
How was [X] unlocked in maimai DX FESTiVAL?: [X] was unlocked by clearing a Perfect Challenge after reaching 700 km total distance in the Happy Fes Area. Starting from maimai DX BUDDiES, it became available by default.
Does [X] appear in other rhythm games?: Yes, [X] also appears in lowiro's Arcaea.