Python bindings for libopenmpt. Libopenmpt is a "cross-platform C/C++ library to decode tracked music files". The docs can be found here: https://lib.openmpt.org/doc/ The bindings are based on the documentation here specifically: https://lib.openmpt.org/doc/group__libopenmpt__c.html.
xrtd_-_osc.xm, the XM file used in the examples, can be found at https://modarchive.org/index.php?request=view_by_moduleid&query=199249.
NOTE: Line 20 of libopenmpt.py says LIBOPENMPT = ctypes.cdll.LoadLibrary("libopenmpt_binaries/bin/x86/libopenmpt.dll"). You should change the library location to fit the binary for your CPU architecture.