Whatls An Md - Aiwa XR-H66MD Operating Instructions Manual

WHAT IS AN MD (MINI DISC)?
THE LIMITATIONS OF MD
An MD is only 64 mm (2'/8 inches) in diameter, about half the
size of a conventional CD. But an MD can be used to store and
playback a full 74 minutes of data such as a CD. Unlike a CD,
an MD comes in a plastic cartridge, so that it can be handled
with ease. The cartridge also protects the disc inside from shocks,
dust and scratches. Unlike cassette tapes, which can become
stretched or tangled, an MD is an excellent durable media.
TYPE OF MD
There are two types of MDs: "Optical discs" and "Magneto-optical
discs". Both types use laser beams and optical pick-up
technology to read recorded data during playback.
Optical discs
These are playback only discs. Like CDs, they are used as
prerecorded music discs. You cannot record or edit them.
D
4
Label
Recordable MO' discs
The shutter covers the
opening only on the
non-labeled side of the
MD.
These are recordable discs which can be recorded on again
and again, like cassette tapes. The recording method called
magneto-optical technology employs a laser and magnetism to
record signals. Therefore, the quality of recorded sound does
not deteriorate even after many playbacks and recordings.
m t
L abel H
The shutter
covers the
opening on both
sides of the MD.
"i MO: An abbreviation of Magneto Optical
Ultra compact size made possible by ATRAC2
technology
A newly developed digital audio compression technology called
the ATRAC system automatically extracts only the frequencies
that are actually audible to the human ear and cuts the
frequencies which are inaudible. This compresses the amount
of data to be recorded to 1/5 of the normal amount. The ATRAC
system is based upon studies carried out in the field of auditory
psychology and does not impair the quality of the audible sound.
'2ATRAC: An abbreviation of Adaptive TRansform Acoustic
Coding
Quick random access
One of the great features of the MD is that you can search for
desired tracks quickly. There are also quick and easy functions
for random playback, in which the order of the tracks can be
rearranged at random, and for renumbering tracks enabling them
to be played in any order.
Recording on the MD is performed differently frc)m that of a
cassette tape or a DAT. Therefore, the MD system is subject to
the following restrictions.
"TOC* Full" is displayed even if the recording time
does not reach the maximum recordable timt? of the
disc (60-minute or 74-minute).
"TOC Full" is displayed when 254 tracks are already recorded
on a disc, without respect to the recording time.
*TOC: An abbreviation of Table Of Contents
"TOC Full" is displayed even if a disc is not fully
recorded on.
If there are lots of emphasis data in a particular track, the unit
handles the data as index codes, and tracks are counted, in
addition, without respect to the time and number of tracks.
The remaining time on a disc is not increased even
after some short tracks have been erased.
When the remaining time on a disc is displayed, it may not be
increased even after erasing short tracks because the sections
less than eight seconds are not counted.
Tracks cannot be joined (the COMBINE function does
not function).
Tracks created by editing may not be joined.
The total of the recorded time and the remaining time
on a disc does not match the maximum recordable
time of the disc (60-minute or 74-minute).
Recording is performed in a minimum unit of one cluster (two
seconds). Even if the recorded section is shorter than two
seconds, a two-second space is needed in recording. Therefore,
the available time becomes shorter. If there are scratches on a
m
disc, the available time becomes even shorter, because the
sections which are scratched are automatically erased.
Track numbers may not be registered properly.
When recording from a CD with the CD 1MD, 3CD~3MD or
CD SING LE~l MD button, small tracks may be created
depending on the contents of a CD.
When using the AUTO MARK function, track numbers may not
be registered properly depending on the contents of the CD.
Digital inputs may not be acceptable.
When digital recording is attempted from recorded material with
copyrights, digital dubbing cannot be performed to a recordable
MD from another MD recorded in digital because of the built-in
record restriction function which complies with the SC MS*
standard.
*SCMS (Serial Copy Management System) is the standard to
restrict single digital dubbing between digital audio systems
thus protecting copyrights.
MiniDisc
(rerecorded sound source)
Digital dubbing
II
1
Recording through analog
CD
inputs
ENGLISH
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