Alpine CDA-137EBT User Manual

Playing back MP3/WMA/AAC
MP3/WMA/AAC les are prepared, then written to a CD-R, CD-RW using
CD-R writing software or stored to a USB Memory. A disc can hold up
to 510 les/folders (including Root Folders), and the maximum number
of folders is 255. This unit can recognize at most 20 Banks(1000 les per
Bank) stored in USB Memory.
Playback may not be performed if a disc or USB Memory exceeds the
limitations described above.
Do not make a les playback time more than 1 hour.
Media supported
The media that this device can play back are CD-ROMs, CD-Rs, and CD-
RWs.
This device also can play back USB Memory media.
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/le name is limited. Valid characters
for folder/le 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 le names,
folder names, etc., are not displayed correctly.
This device also supports FAT 12/16/32 for USB Memory device.
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 les
Files are played back in the order that the writing software writes them
to the disc. Therefore, the playback order may not be what is expected.
Verify the writing order in the software’s documentation. The playback
order of the folders and les is as follows.
About MP3/WMA/AAC
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CAUTION
Except for private use, duplicating audio data (including MP3/
WMA/AAC 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, whose ocial 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 les contain compressed audio data. MP3 encoding is capable of
compressing audio data at extremely high ratios, reducing the size of
music les to as much as one-tenth their original size. This is achieved
while still maintaining near CD quality. The MP3 format realises 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 is similar to MP3 audio data.
What is AAC?
AAC is the abbreviation for "Advanced Audio Coding", and is a basic
format of audio compression used by MPEG2 or MPEG4.
Method for creating MP3/WMA/AAC les
Audio data is compressed using software with MP3/WMA/AAC codecs.
For details on creating MP3/WMA/AAC les, refer to the user's manual for
that software.
MP3/WMA/AAC les that are playable on this device have the le
extensions "mp3"/"wma"/"m4a". Files with no extension cannot be
played back (WMA ver. 7, 8 and 9 are supported). Protected les are not
supported, neither are raw AAC les (using the ".aac" extension).
There are many dierent versions of the AAC format. Conrm that the
software being used conforms to the acceptable formats listed above. It's
possible that the format may be unplayable even though the extension
is valid. Playback of AAC les encoded by iTunes is supported.
Supported playback sampling rates and bit rates
MP3
Sampling rates: 48 kHz, 44.1 kHz, 32 kHz, 24 kHz, 22.05 kHz,
16 kHz, 12 kHz, 11.025 kHz, 8 kHz
Bit rates: 8 -320 kbps
WMA
Sampling rates: 48 kHz, 44.1 kHz, 32 kHz
Bit rates: 32 -192 kbps
AAC
Sampling rates: 48 kHz, 44.1 kHz, 32 kHz, 24 kHz, 22.05 kHz, 16
kHz, 12 kHz, 11.025 kHz, 8 kHz
Bit rates 16 - 320 kbps
This device may not play back correctly depending on sampling rates. In
the USB mode, the playback time may not be correctly displayed when a
VBR (Variable Bit Rate) recorded le is played back.
ID3 tags/WMA tags
This device supports ID3 tag v1 and v2, and WMA/AAC tag. If tag data
is in an MP3/WMA/AAC le, this device can display the title (track title),
artist name, and album name ID3 tag/WMA/AAC tag data. This device
can only display single-byte alphanumeric characters (up to 30 for ID3
tags and up to 15 for WMA tags) and the underscore. For non-supported
characters, “No Support” is displayed.
If information contains characters other than ID3 tag information, the
audio le may not be played back.
The tag information may not be correctly displayed, depending on the
contents.
Root folder
Folder MP3/WMA/AAC File
*
e folder No./ folder Name will not be displayed if no le is contained in
the folder.
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Alpine CDA-137EBT Specifications

General

Brand	Alpine
Model	CDA-137EBT
Category	Car Receiver
Language	English