UFMOD
uFMOD (or μFMOD) is a freeware audio player library written in x86 assembly language. It is used to load and play audio files in XM format.
In the library name, the lowercase u letter is the micro symbol μ [2]
The uFMOD source code can be compiled using FASM.[3]
The uFMOD library was ported to several programming languages and development environments:
The AOCRYPT cryptographic engine uses uFMOD to ensure a specific executable file size.[7] The patcher dUP2[8] uses uFMOD to play background music.