Audio Recording on CD-R / RW: The CD-RW890MKII installs a digital optical input port and analog line-in input RCA ports.* The digital input CD-RW890MKII supports PCM sampling rates of 32 kHz, 44.1 kHz and 48 kHz and automatically records 44.1 kHz audio, which is the standard for audio CD sampling rate. Sync: the handy function automatically starts recording to an audio signal (analogue or digital) from a device such as a CD or MD player, and then stops recording when the signal stops.