The reference audio CD is included. I was concerned about keeping it in the pocket inside the sheet music file, so I stored it separately in a plastic case. I have listened to the audio once. Also, I took out the sheet music once to make a copy, and then stored it carefully in a dark place, so the pages are in good condition. The paper file that holds the sheet music has some minor scratches from storage, and there is a faint mark on the back of the file that follows the circle of the CD, but it is not a stain. Please understand this. I have also included photos. Please purchase only if you fully understand that this is a home-stored, used item.