Sony MZ-R55 Operating Instructions - Page 37

Optional accessories Optical Cable POC-151HG, POC-152HG, POC-MZ1, POC-MZ2, POC-15B, POC-15AB, POCDA12SP Line Cable RK-G129, RK-G136 Car Connecting Pack, CPA-9 Car Battery Cord DCC-E230 Stereo Microphones ECM-717, ECM-MS907, ECM-MS957 Stereo Headphones* MDR-series Active Speakers SRS-A41, SRS-A91 Recordable MDs MDW-series MiniDisc Carrying Case CK-MD4 MiniDisc Filing Box CK-MD10 Your dealer may not handle some of the above listed accessories. Please ask the dealer for detailed information about the accessories in your country. US and foreign patents licensed from Dolby Laboratories Licensing Corporation. Design and specifications are subject to change without notice. * Whether you should plug the headphones directly to (:)/REMOTE on the main unit or to a remote control, use only headphones with stereo mini plugs: stereo mini plugs What is an MD? How MiniDisc works MiniDisc (MD) comes in two types: premastered (prerecorded) and recordable (blank). Premastered MDs, recorded at music studios, can be played back almost endlessly. However, they can't be recorded on or over like cassette tapes. To record, you must use a "recordable MD". Premastered MDs Premastered MDs are recorded and played like regular CDs. A laser beam focuses on the pits in the surface of the MD and reflects the information back to the lens in the recorder. The recorder then decodes the signals and plays them back as music. Recordable MDs Recordable MDs, which use magnetooptical (MO) technology, can be recorded again and again. The laser inside the recorder applies heat to the MD, demagnetizing the magnetic layer of the MD. The recorder then applies a magnetic field to the layer. This magnetic field corresponds exactly to the audio signals generated by the connected source. (The north and south polarities equate to digital "1" and "0".) The demagnetized MD adopts the polarity of the magnetic field, resulting in a recorded MD. 1 37