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01GB05IVA-W205.fm
ALPINE IVA-W205 68-08564Z41-A (EN)
Producing MP3/WMA discs
MP3/WMA files are prepared, then written to a CD-R or CD-RW
(DVD-R/DVD-RW) using CD-R writing software. A disc can hold
up to 1024 files/256 folders (including Root Folders).
Depending on the structure of the folders or files, it may take
time to read a disc. In this case, it is recommended to decrease
the number of folders or files.
Media supported
The media that this device can play back are CD-ROMs, CD-Rs,
CD-RWs, DVD-Rs and DVD-RWs.
Corresponding File Systems
This device supports discs formatted with ISO9660 Level 1 or
Level 2.
Under the ISO9660 standard, there are some restrictions to
remember.
The maximum nested folder depth is 8 (including the root
directory). The number of characters for a folder/file name is
limited.
Valid characters for folder/file names are letters A-Z (all caps),
numbers 0-9, and ‘_’ (underscore).
This device also can play back discs in Joliet, etc., and other
standards that conform to ISO9660. However, sometimes the
file names, folder names, etc., are not displayed correctly.
Formats supported
This device supports CD-ROM, CD-ROM XA, Mixed Mode CD,
Enhanced CD (CD-Extra) and Multi-Session.
This device cannot correctly play back discs recorded with
Track At Once or packet writing.
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.)
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 files.
MP3: ID3 tag
WMA: WMA tag
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.
Root
Folder
Folder MP3/WMA File
01GB00IVA-W205.book Page 17 Wednesday, January 24, 2007 5:11 PM