The following table lists the file formats supported by Windows Media Player.
Format	File name extensions	
CD Audio Track	.cda 	
Intel Video Technology	.ivf 	
Macintosh AIFF Resource	.aif, .aifc, .aiff 	
Microsoft	.asf, .asx, .avi, .wav, .wax, .wma, .wmv, .wvx, .wmp, .wmx	
Windows Media Player skin file	.wmz, .wms	
Playlist files	.asx, .wax, .wvx, .wmx, .m3u	
Moving Picture Experts Group (MPEG)	.mpeg, .mpg, .m1v, .mp2, .mp3, .mpa, .mpe, .mpv2, .m3u	
Musical Instrument Digital Interface (MIDI)	.mid, .midi, .rmi	
UNIX	.au, .snd	
If the file you are playing is included in this table, then it may have been encoded using a codec that is not supported by Windows Media Player.
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