foobar2000 is an advanced audio player that can seamlessly play MP3, MP4, AAC, CD Audio, WMA, Vorbis, Opus, FLAC and much more.foobar2000 features gapless playback, customizable user interface, advanced tagging capabilities, audio CD ripping and transcoding, ReplayGain support, customizable keyboard shortcuts, and third-party apps.It fully supports MP3, MP4, AAC, CD Audio, WMA, Vorbis, Opus, FLAC, WavPack, WAV, AIFF, Musepack, Speex, AU, SND... and more audio formats.