About Mp3 - Alpine CDA-7894RB Owner's Manual

MP3 Operation

About MP3

CAUTION
Except for personal enjoyment, duplicating audio data
(including MP3 data) or distributing, transferring, or
copying it, whether for free or for a fee, without the
permission of the copyright holder is strictly prohibited
by the Copyright Act and by international treaty.
• What is MP3?
MP3, whose official name is "MPEG 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 the audio data at extremely
high ratios shrinking music files by 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
The software used to create MP3 files is widely sold or
free from various sources. For details on creating MP3
files, refer to the user's manual for that software.
The 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
Sampling rates: 32 kHz - 44.1 kHz, bit rates: 32 - 320
kbps
Note that for sampling rates such as 22.05 kHz, this
device's frame display (Page 10) may not display
correctly.
• ID3 tags
This device supports ID3 tag v1.
If ID3 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. For non-supported
characters, "NO SUPPORT" is displayed.
• 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 up to 510
files/folders (including Root Folders).
• 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). File/folder names are limited to 31
characters (including the extension).
22
-EN
Valid characters for folder/file names are letters A-Z (all
caps), numbers 0-9, and '_' (underscore).
This device also can playback discs in Joliet and other
standards that conform to ISO9660. However,
sometimes the file names, folder names, etc. are not
displayed correctly.
• Formats supported
This device supports CD-ROM XA, Mixed Mode CD,
Enhanced CD (CD-Extra) and Multi-Session.
This device can not correctly play back discs recorded
with Track At Once or packet writing.
• Order of tracks
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.
1
3
5
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 level 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.
ID3 tag
Song information such as track titles, artist names,
album names, etc., written into MP3 files.
1
2
2
3
4
4
5
6
MP3 file