Alpine INE-W611D Owner's Manual page 84

ID3 tags/WMA tags
This device supports ID3 tag v1.0, v1.1, v2.2, v2.3, v2.4, and WMA
tag Ver.1.x. If tag data is in an MP3/WMA/AAC file, this device can
display the title (track title), artist name, and album name ID3 tag/
WMA tag data.
For non-supported characters, "?" is displayed.
The number of characters may be limited, or not correctly displayed,
depending on the tag information.
Playing back MP3/WMA/AAC/FLAC/OGG/APE/MP2
MP3/WMA/AAC/OGG/APE/MP2 files are prepared, then written to a
USB flash drive.
• Maximum numbers of playable files/folders USB Flash drive: 5,000
files/ 2,000 folders (including Root Folder)
• Largest playable file size: 512 MB
Playback may not be performed if a disc exceeds the limitations
described above.
If a file/folder name is long, the maximum possible number of files
may decrease.
• Both Audio and Video files are counted if their formats are
playable on this unit.
Media supported
The media that this device can play back a USB flash drive.
Corresponding File Systems
This device supports FAT 16/32.
The maximum nested folder depth is 15 (including the root directory).
File names are limited to 256 characters (including the extension).
Valid characters for folder/file names are letters A-Z (all
caps), numbers 0-9, and '_' (underscore), Special Characters
~!@#$%^&()+`-=;',.{} (except : \/:*?"<>|).
Order of files
Files are played back in the order that the writing software writes
them to the disc. Therefore, the playback order may not be what's
expected. Verity the writing order in the software's documentation.
The playback order of the folders and files is as follows. (The
following numbers may differ from actually displayed numbers.)
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Terminology
Bit rate
This is the "sound" compression rate specified for encoding. The
higher the bit rate, the higher the sound quality, but also the larger
the files.
Sampling rate
This value shows how many times per second the data is sampled
(recorded). For example, music CDs use a sampling rate of 44.1
kHz, so the sound is sampled (recorded) 44,100 times per second.
The higher the sampling rate, the higher the sound quality, but also
the larger the volume of data.
Encoding
Converting music CDs, WAVE (AIFF) files, and other sound files into
the specified audio compression format.
Tag
Song information such as track titles, artist names, album names, etc.,
written into MP3/WMA/AAC/FLAC/OGG/APE/MP2 (USB flash drive) files.
Root folder
The root folder (or root directory) is found at the top of the file system.
The root folder contains all folders and files. It is created automatically for all
burned discs.