About Mp3 - Alpine PKG-RSE1 Manual De Operación

About MP3

CAUTION
Except for private use, duplicating audio data (including MP3
data) or distributing, transferring, or copying it, whether for free
or for a fee, without permission of the copyright holder is strictly
prohibited by the Copyright Act and by international treaty.
What is MP3?
MP3 (MPEG-1 Audio Layer 3) is a compression standard
prescribed by the ISO, the International Standardization
Organization and MPEG, which is a joint activity institution of
the IEC.
MP3 files contain compressed audio data. MP3 encoding is
capable of compressing audio data at extremely high ratios,
reducing the size of music files to as much as one-tenth their
original size. This is achieved while still maintaining near CD
quality. The MP3 format realizes such high compression ratios
by eliminating the sounds that are either inaudible to the
human ear or masked by other sounds.
Method for creating MP3 files
Audio data is compressed by using MP3 specified software.
For details on creating MP3 files, refer to the user's manual for
that software.
MP3 files that can be played back by this device have the file
extension "mp3." Files with no extension cannot be played
back.
Supported playback sampling rates and bit rates
MP3
Sampling rates: 32 kHz - 48kHz
Bit rates: 32 - 320 kbps
Note that for sampling rates, this device may not display
correctly.
This device may not playback correctly depending on
sampling rates.
ID3 tags
If tag data is in an MP3 file, this device can display the title
(track title), artist name, and album name ID3 tag data.
This device can only display single-byte alphanumeric
characters and the underscore.
However, the number of characters may be limited, or not
correctly displayed, depending on the tag information.
Producing MP3 discs
MP3 files are prepared, then written to a CD-R or CD-RW
using CD-R writing software. A disc can hold a maximum of
1,024 files, and 256 folders (including the Root Folder).
Downloading a disc may take a long time, depending on the
configuration of folders or files. In this case, decreasing the
number of folders or files is recommended.
Media supported
The media that this device can play back are CD-ROMs, CD-
Rs, and CD-RWs.
Corresponding File Systems
This device supports discs formatted with ISO9660 Level 1 or
Level 2.
Under the ISO9660 standard, there are some restrictions to
remember.
The maximum nested folder depth is 8 (including the root
directory). The number of characters for a folder/file name is
limited.
Valid characters for folder/file names are letters A-Z (all
caps), numbers 0-9, and '_' (underscore).
This device also can play back discs in Joliet, etc., and other
standards that conform to ISO9660. However, sometimes the
file names, folder names, etc., are not displayed correctly.
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Formats supported
This device supports CD-ROM XA, Mixed Mode CD,
Enhanced CD (CD-Extra) and Multi-Session.
This device cannot correctly play back discs recorded with Track
At Once or packet writing.
Order of files
The unit plays the files in the order that the writing software
writes them. Therefore, the playing order may not be the same
as the order you input. The playback order of the folders and
files is as follows. However, the folder and file playback order
differs from the folder no. and file no. indicated on the display.
Root Folder
Folder
Terminology
Bit rate
This is the "sound" compression rate specified for encoding. The
higher the bit rate, the higher the sound quality, but also the larger
the files.
Sampling rate
This value shows how many times per second the data is sampled
(recorded). For example, music CDs use a sampling rate of 44.1
kHz, so the sound is sampled (recorded) 44,100 times per second.
The higher the sampling rate, the higher the sound quality, but also
the larger the volume of data.
Encoding
Converting music CDs, WAVE (AIFF) files, and other sound files
into the specified audio compression format.
Tag
Song information such as track title, artist name, album name, etc.,
written into MP3 files.
MP3: ID3 tag
Root folder
The root folder is found at the top of the file system. The root folder
contains all folders and files.
MP3 File
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4/14/05 5:34:01 PM