Sony MZ-R37SP Operating Instructions - Page 33

Optional accessories AC-E45HG AC power adaptor NH-WMAA nickel metal hydride rechargeable batteries Optical Cable POC-15B, POC-15AB, POC-DA12SP Line Cable RK-G129, RK-G136 Stereo Microphones ECM-717, ECM-MS907, ECM-MS957 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. 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. 33