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01GB05IVA310.fm
ALPINE IVA-D310 68-02278Z28-A (EN)
About MP3/WMA
What is MP3?
MP3, whose official name is “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.
What is WMA?
WMA, or “Windows Media™ Audio,” is compressed audio data.
WMA allows you to create music files and store them at higher
ratios of compression than MP3 audio data (approx. half original
size). This is achieved while still maintaining CD quality sound.
Method for creating MP3/WMA files
Audio data is compressed by using MP3/WMA specified
software. For details on creating MP3/WMA files, refer to the
user’s manual for that software.
MP3/WMA files that can be played back by this device have the
file extension “mp3” / “wma”. Files with no extension cannot be
played back. (WMA ver. 7.1 and 8 are supported)
Supported playback sampling rates and bit rates
MP3
WMA
This device may not play back correctly depending on sampling
rates or bit rates.
ID3 tags/WMA tags
If tag data is in an MP3/WMA file, this device can display the title
(track title), artist name, and album name ID3 tag/WMA tag data
(maximum 128 characters).
This device can only display single-byte alphanumeric
characters and the underscore. For non-supported characters,
“NO SUPPORT” is displayed.
The number of characters may be limited, or not correctly
displayed, depending on the tag information.
Producing MP3/WMA discs
MP3/WMA files are prepared, then written to a CD-R or CD-RW
using CD-R writing software. A disc can hold up to 1024 files/
256 folders (including Root Folders).
Depending on the structure of the folders or files, it may take
time to read a disc. In this case, it is recommended to decrease
the number of folders or files.
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, Romeo, etc., 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, 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.
CAUTION
Except for private use, duplicating audio data (including MP3/
WMA 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.
Sampling rates: 32 kHz ~ 48 kHz
Bit rates: 32 - 320 kbps
Sampling rates: 32 kHz ~ 48 kHz
Bit rates: 32 - 320 kbps
Root
Folder
Folder MP3/WMA File
01GB00IVAD310.book Page 17 Wednesday, December 1, 2004 4:20 AM