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4 – CD/SD/USB playback
This chapter explains playback functions for audio files stored on
CDs, SD cards and USB flash drives.
This explanation assumes that you have already loaded a CD, SD
card or USB flash drive that contains audio files into the unit, that
the unit is on, and that the current source is set appropriately. (see
"Selecting the playback source" on page 19)
Files that can be played back
This unit can play back files in the following formats.
Audio CDs
Commercially-available music CDs as well as CD-R and CD-RW
discs that have been created in the audio CD format
Data CDs
CD-ROM/R/RW discs with MP3 or WMA files using ISO 9660 (Level
1, Level 2 or Joliet) recording formats can be played back.
SD card/USB flash drive
In addition to files (MP3) dubbed by this unit, this unit can play
audio files that have been recorded by other units or written by a
computer or other audio device if they use the following formats.
Files that can be played back
AAC
MP3
WAV
WMA
NOTE
i This unit cannot play CD-R/CD-RW discs that have not been
finalized.
i For information about sampling frequencies and bit rates that
can be played back, see "Playback file formats" at the end of this
manual. (see "Ratings" on page 40)
i This display of this unit can only show half-width (normal)
alphabet letters and numbers (single-byte). If a file name uses
Japanese, Chinese or other full-width (double-byte) characters,
playback is possible but those characters will be replaced with
* on the display.
i MP3 files are recognized by the ".mp3" extension. Always add
the ".mp3" extension to file names. This unit cannot play MP3
files without the ".mp3" extension. Furthermore, this unit cannot
play files that have the ".mp3" extension if they are not in the
MP3 data format.
i WAV files are recognized by the ".wav" extension. Always add the
".wav" extension to file names. This unit cannot play WAV files
without the ".wav" extension. Furthermore, this unit cannot play
files that have the ".wav" extension if they are not in the WAV
data format.
i Media with more than 300 files or 50 folders might not play
properly.
i Depending on the condition of the disc, playback might skip or
not be possible.
20
File extensions
.m4a, .M4A
.mp3, .MP3
.wav, .WAV
.wma, .WMA
Tracks and folders on SD cards and
USB flash drives
This unit handles audio files on SD cards and USB flash drives as
"tracks".
Some data CDs, SD cards and USB flash drives store files in folders
in the same way that ordinary computer files are handled. Some
also store multiple folders within a single folder, creating a multi-
level structure.
This unit assigns track numbers to audio files for management.
Track numbers are assigned in the following order.
1.
Playable files in each folder are sorted in Unicode order.
Folders, including empty folders and folders that do not con-
tain playable files, are sorted in Unicode order.
2.
If the root folder contains playable files, those files are
assigned numbers first.
3.
After all playable files in the root folder are assigned numbers,
if there are lower-level folders with playable files in them,
those files are assigned numbers
4.
If there are more folders at an even lower level with playable
files in them, those files are assigned numbers If there are no
folders in the lower level, the unit searches for folders on the
same level, and then assigns numbers to the files in those
folders.
During ordinary playback of SD cards and USB flash drives, tracks
are played in numerical order in the same way as audio CDs.
Root folder
Track 001
Track 002
Folder 001
Folder 002
Folder 003
Track and folder structure example
Track 003
Track 004
Folder 004
Track 005
Track 006
Track 007
Folder 005
Track 008
Track 009
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