AM File

What are AM files and how to open them

Are you having problems opening an AM file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your AM files.

What is an AM file?

AM files have multiple uses, and Ace Tracker Module is one of them. Read more about the other uses further down the page.

Ace Tracker Module

Ace Tracker Module format stores tracker-music composed with ACE Tracker for the Atari Falcon030. These are song files including all musical patterns, sample patches, instrument definitions and any ACE-engine specific effects settings, used to play back music compositions made inside the ACE Tracker software.

These modules are written by ACE Tracker on the Falcon, saved as complete music files that include both the instructions (notes, effects, sequence of patterns) and the instruments used. Once saved they are played back by the same software or compatible trackers that emulate the ACE sound-engine. They are preserved and shared as ".am" files in the ACE Tracker community, often with demos or music releases.

Internal structure begins with the ASCII signature "AM01" at the start of the file, followed by further strings like "ASD1" at offset 56, and embedded keywords such as EMPTY, APN1, ASG1, ASSH, which help identify fields or sections inside the data.

How to open AM files

Important: Different programs may use files with the AM file extension for different purposes, so unless you are sure which format your AM file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested four different AM openers which you will find listed below.

Last updated: August 17, 2026

All known file formats using extension .AM

While Ace Tracker Module is a popular type of AM-file, we know of 3 different uses of the .AM file extension. Different software may use files with the same extension for different types of data.

AmiraMesh

AmiraMesh is the native general-purpose file format used by Amira software for storing 3D or 4D scientific data. It serves as a flexible container that can represent regular or irregular grids, volumetric scalar or vector fields, segmented regions, landmarks, or colormaps. Data saved in AmiraMesh can be in ASCII or binary form depending on the user's preference or the requirements of downstream processing.

Files are written by Amira (developed by Thermo Fisher Scientific and the Zuse Institute Berlin) when creating data objects such as volumes, meshes, or labels. When such a file is loaded back into Amira, its header is parsed to interpret how to reconstruct the data as a field, grid, or mesh object. The workflow often involves specifying grid dimensions (uniform or non-uniform), bounding box, coordinate type, and one or more data arrays. After the header, if the format is binary, a marker like "# Data section follows" and "@1" precede the raw data block; if ASCII, data values follow directly in text.

The file begins with an ASCII header line such as "# AmiraMesh BINARY-LITTLE-ENDIAN 2.1" or "# AmiraMesh ASCII 1.0" that identifies version and encoding; this line appears at the very start. Several recognizable keywords appear in the header, including "define Lattice" (grid dimensions), "Parameters" (bounding box, CoordType), and definitions of data sections such as "Lattice { float Data } @1" or "Lattice { float[2] Data } @1" to describe the datatype and number of components per grid point.

Anark Media Data

Anark Media Data files store interactive multimedia presentations created with Anark Studio, which may include video, audio, 2D/3D graphics, scripted behaviors, animations, and interactivity. When a presentation is complete, Anark Studio exports it as a media file for distribution or embedding; this file encapsulates all assets and logic needed for playback. Users can view it via the Anark Media Player, the Anark Web Client, or using web browsers via a plugin or a self-contained player embedding the file into HTML.

The files are produced by exporting from Anark Studio: the authoring tool where designers assemble multimedia content on a timeline, set up behaviors (often script-based), import 3D models (for example .3ds, .amx, etc.), video, images, and audio, then choose to export as an "Anark media file." Once exported, the file can be distributed as standalone content, embedded on webpages (with a client plugin or ActiveX control), or run via Anark's media clients without needing the full authoring environment.

These files begin with a binary signature: at offset zero the header includes the ASCII string "A.N.A.R.K" preceded by a sequence of bytes and control values identifying the file as Anark Media Data.

Various apps that use files with this extension

These apps are known to open certain types of AM files. Remember, different programs may use AM files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about AM file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.