Miles Sound System

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Miles Sound System
Developer(s) RAD Game Tools
Initial release 1991
Stable release
9.3b / December 12, 2012
Operating system Cross-platform
Type Audio library

Miles Sound System (MSS), formerly known as Audio Interface Library (AIL), is a sound software system primarily for video games and used mostly as an alternative for low-end audio chipsets. It uses little CPU time while providing adequate audio output. It was originally a middleware driver library for soundcards to use in DOS applications when no viable alternative was available. RAD Game Tools acquired the technology from Miles Design in 1995.

The 1992 AIL version 2 for DOS has been released by John Miles as open-source (public domain with out restrictions) in 2000.[1][2] The package can be found on his personal site ( and contains source code for both real-mode and protected-mode programs.


The Miles Sound System was used in its history by approximately 5400 video games on over 14 platforms.[3]


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