Sony MZ-RH1 - Manual (Page 80)

Explanations
About Hi-MD
“Hi-MD” is a new MiniDisc format. Incorporating the new ATRAC3plus audio compression
technology, Hi-MD is a new recording format that delivers longer recording times than standard
MD discs. Hi-MD discs can also be used as a computer storage medium for non-audio data such as
text and still images.
About ATRAC
ATRAC (Adaptive TRansform Acoustic Coding) is a generic term for an audio compression
technology that realizes both high sound quality and high compression rates. Three versions are in
use: ATRAC (SP mode (normal MD format)), ATRAC3 (LP2 and LP4 modes) and ATRAC3plus
(Hi-SP and Hi-LP modes). Compared with a CD, the compression rate for ATRAC3 is about 10
times higher, and for ATRAC3plus, about 20 times higher.
“Hi-MD mode” and “MD mode”
This recorder has two operation modes, “Hi-MD mode” and “MD mode” that are automatically
recognized whenever a disc is inserted.
Disc Mode
1GB Hi-MD disc Hi-MD
60/74/80-minute
standard disc Blank disc The operation mode set in the “Disc
Mode” ( page 59) menu is applied.
Disc containing music
in Hi-MD mode Hi-MD
Disc containing music
in MD mode MD
About LinearPCM
LinearPCM is a digital, non-compressed audio coding system. You can enjoy high-quality sound
equal to that of CDs by recording in this mode.
The meaning of “no sound”
“No sound” describes a recorder condition in which the input level is about 4.8 mV during analog
input or less than –89 dB during optical (digital) input (with 0 dB as full bit (the maximum
recordable level for a MiniDisc)).
About System File
The system file is space on the disc that is used to store information other than audio files; for
instance, track numbers.
If the MiniDisc were a book, the system file would correspond with the index or table of contents.
The recorder rewrites the system file whenever an operation such as recording, adding or deleting
track marks, or moving tracks has been done. (“SystemFILE WRITING” appears in the display
when the recorder is rewriting the system file.) While the recorder is writing disc information,
make sure not to move or jog the recorder or disconnect the power source as this may cause the
information to be incorrectly recorded or the disc contents to be lost.
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MZ-RH1/MZ-M200.GB.2-669-084-11(1)