Up to 74 minutes of high quality CD audio can be recorded in standard play mode. Newer models offer twice that capability, plus the capability to record and play MP3's, Wav and WMA files. Digital audio may be up/downloaded via a built in USB port on small portable models such as the Sony Walkman NZ-N707. Incredible versatility in a portable stereo "sound studio" measuring only 3x3x1 inches or so.