foobar2000 is an advanced freeware audio player for the Windows platform. Some of the basic features include full unicode support, ReplayGain support and native support for several popular audio formats. Supported audio formats: MP3, MP4, AAC, CD Audio, WMA, Vorbis, FLAC, WavPack, WAV, AIFF, Musepack, Speex, AU, SND... and more with additional components.