libopenmpt-doc 0.4.11-1build1 (amd64 binary) in ubuntu focal

 libopenmpt is a cross-platform C++ and C library to decode tracked music
 files (modules) into a raw PCM audio stream. It is based on the player code
 of the OpenMPT project, a descendant of the original ModPlug Tracker.
 .
 This package contains documentation for developing programs which use
 libopenmpt.