From Music Player Daemon Community Wiki

• Can play over a network stream using icecast2
• Plays MP3, Ogg Vorbis, FLAC, MP4/AAC, Mod, Musepack, and wave files
• Also plays MP3 and Ogg Vorbis streams (e.g. Internet radio)
• Remotely control MPD over a network (IPv4 and IPv6 supported)
• Easy to Install
• Stores ID3 (id3v1 and id3v2) tag information (MP3s, FLACs, and AACs)
• Stores Vorbis Comments information (Oggs and FLACs)
• Stores apev2 tag information (musepack)
• Stores MP4 metadata information (MP4/AACs)
• ID3/Vorbis information can be searched
• Easy to import new songs
• Buffer support for playback (prevents skipping due to high load or network latency)
• Gapless playback (great for live albums)
• Crossfading support
• Seeking support
• Save, Load, and Manage Playlists (in m3u format)
• Volume control (OSS, Alsa, and software mixers)
• Wide range of audio devices supported:
  • Native: ALSA, OSS and OSX
  • Libao: OSS, ALSA, Sun, esd, arts, and more, see the libao output plugins for more information.
• Minimal hardware requirements
• Tested on many different operating systems