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Sony CDX-GT31U Manual

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About USB devices
• Mass Storage Class and ATRAC Audio Device
type USB devices compliant with the USB
standard can be used. However, this unit cannot
recognize USB devices via a USB HUB. For
details on the compatibility of your USB device,
visit the Sony support website (page 21).
• Corresponding codec is different according to
device type.
– Mass Storage Class: MP3/WMA/AAC
– ATRAC Audio Device: ATRAC/MP3/WMA/
AAC
• DRM (Digital Rights Management) files other
than ATRAC may not be played.
• The maximum number of displayable data is as
follows.
Mass Storage Class:
– folders (albums): 128, files (tracks) per folder:
500
ATRAC Audio Device: ATRAC/MP3/WMA/AAC
– albums/artists/playlists/genres: 65,535, tracks:
65,535
Notes
• When using a cable, use the one supplied with the
USB device to connect.
• Do not use a USB device that is so large or heavy it
may interfere with driving operations.
• Do not leave a USB device in a parked car, as
malfunction may result.
• It may take time for playback to begin, depending on
the amount of recorded data.
• Backup of data in a USB device is recommended.
Playback order of MP3/WMA/AAC
files (CD-R/RW or Mass Storage
Class)
About MP3 files
• MP3, which stands for MPEG-1 Audio Layer-3, is
a music file compression format standard. It
compresses audio CD data to approximately 1/10
of its original size.
• ID3 tag versions 1.0, 1.1, 2.2, 2.3 and 2.4 apply to
MP3 only. ID3 tag is 15/30 characters (1.0 and
1.1), or 63/126 characters (2.2, 2.3 and 2.4).
• When naming an MP3 file, be sure to add the file
extension “.mp3” to the file name.
• During playback or fast-forward/reverse of a VBR
(variable bit rate) MP3 file, elapsed playing time
may not display accurately.
Note
If you play a high-bit-rate MP3, such as 320 kbps,
sound may be intermittent.
About WMA files
• WMA, which stands for Windows Media Audio,
is a music file compression format standard. It
compresses audio CD data to approximately 1/22*
of its original size.
• WMA tag is 63 characters.
• When naming a WMA file, be sure to add the file
extension “.wma” to the file name.
• During playback or fast-forward/reverse of a VBR
(variable bit rate) WMA file, elapsed playing time
may not display accurately.
* only for 64 kbps
Note
Playback of the following WMA files is not supported.
– lossless compression
About AAC files
• AAC, which stands for Advanced Audio Coding,
is a music file compression format standard. It
compresses audio CD data to approximately 1/11*
of its original size.
• AAC tag is 126 characters.
• When naming an AAC file, be sure to add the file
extension “.m4a” to the file name.
• During playback or fast-forward/reverse of a VBR
(variable bit rate) AAC file, elapsed playing time
may not display accurately.
* only for 128 kbps
Note
Playback of the following AAC files is not supported.
– lossless compression
– copyright-protected
About ATRAC files
ATRAC3plus format
ATRAC3, which stands for Adaptive Transform
Acoustic Coding3, is audio compression
technology. It compresses audio CD data to
approximately 1/10 of its original size.
ATRAC3plus, which is an extended format of
ATRAC3, compresses the audio CD data to
approximately 1/20 of its original size. The unit
accepts both ATRAC3 and ATRAC3plus format.
The characters for text information written by
SonicStage are displayed.
If you have any questions or problems concerning
your unit that are not covered in this manual, consult
your nearest Sony dealer.
Folder
(album)
MP3/WMA/
AAC file
(track)
MP3/WMA/AAC
… 16 …


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