FFT is an original maimai song produced by cybermiso, first introduced to the series during maimai FiNALE's PANDORA BOXXX event on March 8, 2019. Its title is an acronym for Fast Fourier Transform, a fundamental algorithm in digital signal processing, and fits into a loose series of mathematically named compositions cybermiso contributed to multiple rhythm game platforms, including "Z[i]" for CROSS×BEATS (referencing Gaussian integers) and "UFD" for ToneSphere (Unique Factorization Domain). The song marks cybermiso's return to maimai with a brand-new commission since contributing "Panopticon" to the MURASAKi album. The track is a brisk, high-BPM (180) electronic piece characteristic of cybermiso's style, accompanied by a music video created by the artist Shun (駿). The MV contains hidden Morse code that, when decoded, spells out references to the maimai MURASAKi album, the title "FFT," and various cryptic names that have sparked community speculation. Three different chart designers contributed to the song's upper-difficulty charts: サファ太 (Safata) handled the Expert chart, safaTAmago took on the Master chart with a dense 849-note count, and JAQ produced the Re:Master chart, a demanding 947-note layout that ranks among the most technically rigorous STANDARD charts from the FiNALE era. Though initially locked behind the time-limited PANDORA BOXXX event, FFT became freely accessible to all players starting with the maimai でらっくす update.