From ZDoom Wiki
foo_DUMB is originally a plugin for a significantly modified version of the Dynamic Universal Music Bibliotheque. A customized version of this plugin (based on foo_DUMB v0.9.8.4) is used in ZDoom to provide an alternate module replayer.to let it use
Advantages and drawbacks
- Supports more tracker module formats than the FMOD replayer.
- Extremely slow in Win32 debug builds. (In release builds, however, it is faster than the FMOD replayer.)