If your trying to play an "m4a" file you need to have [bold]Quicktime[/bold] installed. Learn about (MPEG-4, audio): http://en.wikipedia.org/wiki/M4a#.2A.m4a Learn about (the .m4a extension): http://www.filext.com/detaillist.php?extdetail=m4a&goButton=Go --Later-- Oh I forgot to tell ya, To play .m4a files with apps other than Quicktime install these DS filter(s): [bold]3ivx[/bold] 1) http://www.afterdawn.com/software/video_software/codecs_and_filters/3ivx_codec.cfm [bold]Matrix Mixer[/bold] (optional) 2) http://matrix-mixer.sourceforge.net/ Ced