Adlib Tracker pattern file
File type: Audio and sound file
The .a2p file extension identifies a pattern file used by Adlib Tracker II, a music tracker for Microsoft MS-DOS.
The file stores pattern data used in composing music and audio samples.
File type category:
Audio and sound file
Date updated: October 2, 2026
Adlib Tracker II is an MS-DOS music composition and audio editing program designed for AdLib-compatible sound hardware. An A2P file contains pattern data used when arranging music and composing audio samples.
A pattern is a reusable section of a track rather than a complete song. Adlib Tracker II combines patterns with other song data to create a complete composition. The format is a native working format for this software.
The format is a legacy format associated with MS-DOS software and is not commonly used by current music applications.
Open the .a2p file with Adlib Tracker II on Microsoft MS-DOS. The file is intended to be loaded as a pattern within the tracker.
To retain the pattern data, open the .a2p file in Adlib Tracker II and save or export the composition using a format supported by the program, if available.
Software applications that can open a2p files:
Microsoft MS-DOS
Software apps that create a2p files:
Microsoft MS-DOS
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