2.7.2

This is a release candidate for 2.8.0.

In addition to lots of bug fixes, here are the major changes in this release:

• Added support for loading wavpack sound files (https://www.wavpack.com/)
• Added support for loading classic console sound files using Game_Music_Emu (https://github.com/libgme/game-music-emu)
• Use minimp3 instead of dr_mp3 as the default backend for MP3 music
• Use libxmp instead of modplug as the default backend for MOD music
  To use libmodplug instead, configure using --enable-music-mod-modplug --disable-music-mod-xmp
• Added support for FLAC audio in Ogg containers
• Added Mix_PauseAudio() to pause and resume all audio playback
• Added Mix_GetNumTracks() and Mix_StartTrack() for managing tracks in GME files