
MP31WMAIAAC What
is
AAC?
CDIMP31WMAIAAC Operations
What
is
MP3?
MP3
is
an audio compression method and
classified into audio layer 3of MPEG standards.
This audio compression method has penetrated
into
PC
users and become astandard format.
This MP3 features the original audio data
compression to about 10 percent of its initial
size with ahigh sound quality. This means that
about
10
music CDs can be recorded
on
aCD-R
disc or CD-RW disc to allow along 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
playa
file with
DRM
(Digital Rights
Management) for WMA remaining
ON,
no audio
is
output (The WMA indicator blinks).
•Windows Media
TM,
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 9/10/11,
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.
•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 MP31
WMAIAAC file
•Usable sampling rates and bit rates
1.
MP3: Sampling rate 8kHz-48 kHz,
Bit rate 8kbps-320 kbps /VBR
2.
WMA: Bit rate 8kbps-320 kbps
3.
AAC: Sampling rate 8kHz-48 kHz,
Bit rate 8kbps-320 kbps /VBR
•File extensions
1.
Always add afile extension ".MP3", ".WMA"
or ".M4A" to MP3, WMA or AAC file by using
single byte letters. If you add afile extension
other than specified or forget to add the file
extension, the file cannot be played.
2.
Files without MP3IWMAlAAC data will not
play. The files will be played soundlessly if
you attempt to play files without MP3IWMAI
AAC data.
*
When
VBR
files
are
played,
the
play time
display
may
differ the play location.
*
When
MP3IWMAlAAC files
are
played, alittle
no
sound part
is
caused between tunes.
DUZ385SAT 19