Muso

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 The uFMOD source code can be compiled using FASM.
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. The patcher dUP2 uses uFMOD to play background music.