Digital Sound & Music Interface (DSMI) was a sound system for ms-dos programs, offering support for different sound cards. It was coded by Otto Chrons/Virtual Visions. The module files commonly used the suffix .amf. It is now open source here.

PMODE is a DOS extender used in several IBM PC compatible DOS applications in the mid and late 1990s. It was created by Thomas "Tran" Pytel, and the first version became publicly available in 1994.