Alpine iDA-X300 Owner's Manual page 20

Depending on the software that is used to create AAC, the file
format may differ from the extension.
Playback of AAC files encoded by iTunes is supported.
Supported playback sampling rates and bit rates
MP3
Sampling rates: 48 kHz, 44.1 kHz, 32 kHz, 24 kHz, 22.05 kHz,
16 kHz, 12 kHz, 11.025 kHz, 8 kHz
Bit rates: 32 - 320 kbps
WMA
Sampling rates: 48 kHz, 44.1 kHz, 32 kHz, 24 kHz, 22.05 kHz,
16 kHz
Bit rates: 16 - 320 kbps
AAC
Sampling rates: 48 kHz, 44.1 kHz
Bit rates: 8 - 576 kbps
This device may not play back correctly depending on sampling
rates.
The playback time may not be correctly displayed when a VBR
(Variable Bit Rate) recorded file is played back.
ID3 tags/WMA tags
This device supports ID3 tag v1 and v2.2.0, v2.3.0 and WMA
tag. The following files do not support compression, coding,
grouping or non-synchronization.
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.
This device can only display single-byte alphanumeric
characters and the underscore. For non-supported characters,
"NO SUPPORT" is displayed.
The tag information may not be correctly displayed, depending
on the contents.
Playing back MP3/WMA/AAC
MP3/WMA/AAC files are prepared, and then written to USB
memory. Or, synchronize an MP3/WMA file using Windows
Media Player (Ver. 7.1, 8, 9, 9.1, 9.2), and then forward to the
Portable audio player.
A USB memory device can hold up to 10,000 files/1000 folders
(including Root Folders). Playback may not be performed if a
USB memory/Portable audio player device exceeds the
limitations described above.
Do not make a file's playback time more than 1 hour.
Media supported
This device can play back USB memory/Portable audio player
media.
Corresponding File Systems
This device supports FAT 12/16/32.
Order of tracks
The unit plays the files in the order that the writing software
writes them. Therefore, the playing order may not be the same
as the order you input. The playback order of the folders and
files is as follows. However, the folder and file playback order
differs from the folder and file number indicated on the display.
18
-EN
Root folder
Folder
* The folder No./folder Name will not be displayed if no file is
contained in the folder.
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 files.
Root folder
The root folder is found at the top of the file system. The root folder
contains all folders and files.
MP3/WMA/AAC File