Sony CDX-GT414U - Manual (Page 15)

15
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, and is not
compatible with devices that have a HUB
function. For details on the compatibility of your
USB device, visit the Sony support website
(page 20).
• 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 cannot be played.
• Displayable data are as follows.
Mass Storage Class:
– Folders (Albums): 512, Files (Tracks): 65535
ATRAC Audio Device: ATRAC/MP3/WMA/AAC
– Albums/Artists/Playlists: 65535, Tracks: 65535
Notes on USB devices
• When using a cable, use the one supplied with the
USB devices to connect.
• Do not use USB devices that are so large or heavy
that may interfere with driving operations.
• Do not leave USB devices in a parked car, as
malfunctions may result.
• It may take time for playback to begin, depending on
the amount of recorded data.
• Backup of data in USB devices is recommended.
Playback order of MP3/WMA/AAC
files
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 on MP3
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 on WMA
Playback of the following WMA files is not supported.
– lossless compression
– copyright-protected
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 on AAC
Playback of a copyright-protected file is not supported.
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 ATRAC is in the structure of a 2-level
hierarchy; one folder (group), two files (tracks).
– ATRAC CD
The maximum number of folders (groups) is
255, and the maximum number of files (tracks)
is 999.
Folder
(album)
MP3/WMA/
AAC file
(track)
MP3/WMA/AAC
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