.AFF File Extension

An AFF file may also be a chart file used by Arcaea, a rhythm-based video game. It defines the buttons a user must press while playing a level in Arcaea. AFF files are stored in level-specific directories within Arcaea, along with that level's .OGG audio file and .JPG cover file.

Arcaea is a video game in which players must press buttons in time to music. The game is developed by Lowiro and available for Android, iOS, and the Nintendo Switch.

Each Arcaea level consists of a song, saved as an OGG file, and one or more Arcaea charts, saved as AFF files. Typically, a level uses three AFF files, each of which corresponds to one of the level's difficulties (easy, medium, or hard). These files define the buttons a user must press in time to the song.

Some Arcaea modders use custom level creation tools to create their own AFF files. These files are often packaged within ARCOIDLEVEL archives, which are renamed .ZIP files.

You can open an AFF file, to play and edit the chart it contains, with ArcCreate. ArcCreate is a fan-made version of Arcaea that includes a custom level editor. The level editor is available in the PC version of ArcCreate.

You can also use AffTools or ArcaeaChartRender to analyze and preview the chart an AFF file contains.

For instructions on how to use custom levels with the Android version of Arcaea, click here.

An AFF file may also be a disk image saved in the Advanced Forensics Format (AFF), which is utilized for capturing digital evidence in a forensically sound manner. It contains raw disk data and metadata related to the digital evidence. AFF files support zlib and LZMA compression algorithms to efficiently manage file size.

Users typically find AFF files in environments focused on digital forensic analysis, such as law enforcement agencies and digital investigation units. These files can be divided into a split archive (.AFD file) to manage large datasets better. Metadata from the disk image can be separately extracted and stored in an .AFM file for detailed analysis.

NOTE: Version 2 of the AFF specification introduced support for encryption, enhancing the security of stored data. The AFF format remains widely used in forensic investigations for its ability to securely store and manage digital evidence, ensuring its integrity during legal proceedings.

You can open AFF files with various disk image processing software, such as PassMark OSForensics, GetData Mount Image Pro, and Smart Projects IsoBuster. AFFLIB also supports AFF files, but it is discontinued.

Smart Projects IsoBuster can convert AFF files to several file types, including the following formats:

• .ISO – Disk Image File
• .BIN – Binary Disc Image
• .IMG – Disc Image Data File