MPD is a music player daemon that can be used to create a variety of music playback solutions. It is written in C and has a variety of language bindings available. MPD is designed to be lightweight and have a low memory footprint. It can be used on a variety of systems, including embedded systems. MPD supports a variety of audio output formats, including MP3, Ogg Vorbis, FLAC, and WAV. It also supports a variety of audio input formats, including MP3, Ogg Vorbis, FLAC, and WAV. MPD has a variety of features, including gapless playback, ReplayGain, and support for streaming audio from the Internet.