SDL_mixer is a multi-channel audio mixer library for SDL. It supports any number of simultaneously playing channels of 16 bit stereo audio, plus a single channel of music. Supported formats include FLAC, MOD, MIDI, Ogg Vorbis, and MP3.

This package supports two MIDI backends, selectable at runtime. To use the newer fluidsynth library, install a soundfont such as fluid-3 and specify it using the SDL_SOUNDFONTS environment variable. For the legacy timidity backend, install a patch set such as freepats and set the path to the configuration file with TIMIDITY_CFG.