Miles Sound System

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Miles Sound System
Original author(s) John Miles
Developer(s) RAD Game Tools
Initial release 1991; 27 years ago (1991)
Stable release
10.0.31 / June 25, 2018; 24 days ago (2018-06-25)[1]
Operating system DOS, Windows, Linux, Classic Mac OS, macOS, Xbox, Xbox 360, Xbox One, PlayStation 2, PlayStation 3, PlayStation 4, PlayStation Portable, PlayStation Vita, Wii, Wii U, Nintendo Switch, Nintendo 3DS, Android, iOS, Windows Phone[1]
Type Application programming interface (API)

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.[2][3] 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.[4] Computer Gaming World stated in 1994 that "Many of the game publishers have decided to support only those sound cards which are supported by the Miles drivers", especially the Sound Blaster.[5]


  1. ^ a b "Miles Sound System Development History". Retrieved July 2, 2018. 
  2. ^ AIL Version 2, the complete Open Source release of the Miles Sound System Version 2 for DOS on
  3. ^ AIL2.ZIP
  4. ^ miles on
  5. ^ "Sound Philosophy". Letters from Paradise. Computer Gaming World. January 1994. pp. 120,122. 

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