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About AAC, MP3 and WMA
The playable AAC/MP3/WMA file (hereafter called
Audio file) and the media format has the following
limitation. The Audio file, which is not conforming
to the specification, may not play normally, or the
file and folder names may not display correctly.
Playable Audio file
• AAC, MP3, WMA
• Attach the correct extension for the Audio file (AAC:
".M4A", MP3: ".MP3", WMA: ".WMA")
• Do not attach the extensions to files other than the
Audio file. If the extension is attached, the file, which is
not the Audio file, will play and outputs a loud noise,
causing damage to the speaker.
• The files with copy protection cannot be played.
• Audio files cannot be played depending on the encoding
software setting, USB device type, and/or recording
conditions.
• The unit may not be compatible with upgrade
of compression format standard and additional
specifications.
• For details on the formats used for USB devices and
restrictions, refer to http://www.kenwood.com/usb/.
Playable AAC file
• ".m4a" file encoded by AAC-LC format.
Refer to
http://www.kenwood.mediamanager.jp
for the details.
Playable MP3 file
• MPEG 1/2 Audio Layer 3 file
• Transfer bit rate: 8-320 kbps
• Sampling frequency: 16, 22.05, 24, 32, 44.1, 48 kHz
Playable WMA file
• The file in accordance with Windows Media Audio
(Except for the file for Windows Media Player 9 or
after which applies the new functions)
• Transfer bit rate: 48-192 kbps
• Sampling frequency: 32, 44.1, 48 kHz
Playable Storage media
• CD-ROM, CD-R, CD-RW
• USB device
• CD-RW discs which are quick formatted by the writing
software cannot be used.
• When recording to the maximum CD-R/RW media
capacity at once, the writing software is set to "Disc at
once".
• For details on the available USB devices, refer to <About
USB device> (page 7).
Playable CD-R/RW format
• ISO 9660 Level 1/2
• Joliet
• Romeo
• Long file name.
Playable file format of USB device
• For the formats supported by USB devices, refer to
http://www.kenwood.com/usb/.
The maximum number of characters for
display (CD-R/RW)
File/Folder name: 128 characters
MP3 ID3 Tag/ WMA Contents property:
30 characters
AAC song information: 60 characters
• File/Folder name is the number of the characters
including the extensions.
• This unit can display the following versions of MP3 ID3
tag: version 1.0/ 1.1/ 2.3
• AAC ID3 Tag cannot be displayed.
Limitation of structure for the file and the
folder (CD-R/RW)
• Maximum number of directory levels: 8
• Maximum number of folders: 100
• Maximum number of files per folder: 4096
About partition of the USB device
• While using the USB device, virtual folders are
created to control the partition in the USB device.
These folders appear in the first level (root)
directory as "#:". "#" is an alphabet to identify each
partition.
• Even when the USB device does not have
partition, "A:" folder is created, and audio files are
controlled inside this folder.