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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 images.
For more details on Hi-MD, refer to the supplied flyer “What you can do with the Hi-MD Walkman”.
About ATRAC3plus
ATRAC3plus is an enhanced version of ATRAC3.
Compared to ATRAC3 (used in LP2 and LP4 mode of the recorder), which attains a compression ratio
10 times higher than that of a CD, ATRAC3plus (used in Hi-SP and Hi-LP mode of the recorder)
achieves a higher compression ratio that is 20 times higher than that of a CD, but with no loss in sound
quality.
“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. If you insert a blank disc, the recorder allows you to specify
either of these operation modes for disc recording (except in the case of Hi-MD discs that support Hi-
MD mode only). When using a blank disc, set the “Disc Mode” setting to select either “Hi-MD” or
“MD”.
About Linear PCM
Linear PCM 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. (“SYSTEM FILE 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.