: Refers to a version of the game, likely a modified or "unknown" specific build.
: This is the most unique part. It likely refers to Black Frame Insertion (BFI) , a technique used to reduce motion blur in rhythm games by inserting black frames between game frames. "User-hidden" suggests this feature may be a hidden or experimental setting enabled by the modder. Context for Rhythm Game Enthusiasts : Refers to a version of the game,
: "Hidden" flags in the file name usually point to community-added quality-of-life improvements not found in the official 7th Beat Games release. Important Safety Note : Refers to a version of the game,
: BFI is a sought-after feature for high-level players to improve visual clarity during fast-paced levels. : Refers to a version of the game,