Quintessential Player Quintessential Player (a.k.a. QCD) is a feature rich media player for Microsoft Windows. It supports all popular audio formats including MP3, WMA, Ogg Vorbis, and CDs. QCD is highly skinnable and has a robust plug-in architecture. QCD performs CD Ripping and Encoding, streams Internet Radio, and can Clean and Tag all your audio files. QCD uses Gracenote for the best music rec