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DXZ578RUSB
CD/MP3/WMA/AAC Operations
MP3/WMA/AAC
What is MP3?
MP3 is an audio compression method and
classified into audio layer 3 of MPEG standards.
This audio compression method has penetrated
into PC users and become a standard format.
This MP3 features the original audio data
compression to about 10 percent of its initial
size with a high sound quality. This means that
about 10 music CDs can be recorded on a CD-
R disc or CD-RW disc to allow a long listening
time without having to change CDs.
What is WMA?
WMA is the abbreviation of Windows Media
Audio, an audio file format developed by
Microsoft Corporation.
Notes:
If you play a file with DRM (Digital Rights
Management) for WMA remaining ON, no audio
is output (The WMA indicator blinks).
Windows Media™, and the Windows ® logo are
trademarks, or registered trademarks of Microsoft
Corporation in the United States and/or other
countries.
To disable DRM (Digital Rights
Management)
1. When using Windows Media Player 8, click
on TOOLS
OPTIONS
COPY MUSIC
tab, then under COPY SETTINGS, unclick
the check box for PROTECT CONTENT.
Then, reconstruct files.
2. When using Windows Media Player 9, click
on TOOL
OPTIONS
MUSIC RECORD
tab, then under Recording settings, unclick
the Check box for RECORD PROTECTED
MUSIC. Then, reconstruct files.
Personally constructed WMA files are used
at your own responsibility.
What is AAC?
AAC is an acronym for “Advanced Audio
Coding” and refers to the audio compression
method used with video compression
standards MPEG-2 and MPEG-4.
AAC files composed with the following
conditions can be played:
- AAC files encoded with iTunes.
- iTunes Ver. 7.0 or earlier.
- File extension “.m4a” (“.M4A”)
Tracks purchased at an iTunes Music store,
and copyright-protected files cannot be
played.
When playing AAC files that include image
data, additional time may be required before
playback begins.
Files may not play properly, depending on the
iTunes version under which an AAC file is
encoded.
Precautions when creating MP3/
WMA/AAC disc
Usable sampling rates and bit rates
1. MP3: Sampling rate 8 kHz–48 kHz,
Bit rate 8 kbps–320 kbps / VBR
2. WMA: Bit rate 32 kbps–192 kbps
3. AAC: Sampling rate 8 kHz–48 kHz,
Bit rate 8 kbps–320 kbps / VBR
File extensions
1. Always add a file extension “
.MP3
” (.mp3),
.WMA
” (.wma) or “
.M4A
” (.m4a) to MP3,
WMA or AAC file by using single byte letters.
If you add a file extension other than
specified or forget to add the file extension,
the file cannot be played.
2. Files without MP3/WMA/AAC data will not
play. The indication “
– –:– –
” appears in the
play time display if you attempt to play files
without MP3/WMA/AAC data.
Logical format (File system)
1. When writing MP3/WMA/AAC file on a CD-R
disc or CD-RW disc, please select “ISO9660
level 1, 2 or JOLIET or Romeo or APPLE
ISO” as the writing software format. Normal
play may not be possible if the disc is
recorded on another format.
2. The folder name and file name can be
displayed as the title during MP3/WMA/AAC
play but the title must be within 64 single
byte alphabetical letters and numerals
(including an extension).
3. Do not affix a name to a file inside a folder
having the same name.
Folder structure
1. A disc with a folder having more than 8
hierarchical levels will be impossible.
DXZ578RUSB_EN.book 20 ページ 2006年12月26日 火曜日 午後2時49分
20


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