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WMA OPERATION
The unit that can play the WMA disc and
the operation is the same with MP3
operation described above.
AUDIO DSP (MP3/WMA DECODER)
The audio DSP converts MP3/WMA
stream data from the CD-ROM decoder
to PCM data.
The following standards and bit rate are
supported.
The audio DSP automatically identifies
the supported bit rate and mode, and
sampling frequency. MP3 and WMA must
be identified by the microcontroller.
CAUTION: VBR of WMA can be played
back if the bit rate is 48 kbps or higher.
If a bit rate of less than 48 kbps exists in
a stream, that stream cannot be correctly
played back.
You are suggested to play the WMA
stream data with the sampling frequency
of 44.1kHz and the bit rate over 128kbps,
then you can get better effect.
Standard
MPEG1 Audio
LAYER3
(48kHz/
44.1kHz/
32kHz)
MPEG2 Audio
LSF LAYER3
(24kHz/
22.05kHz/
16kHz)
Windows
Media Audio
(32kHz)
Windows
Media Audio
(44.1kHz)
Windows
Media Audio
(44.1kHz)
Windows
Media Audio
(48kHz)
Bit Rate (kbps)
320,256,224,
192,160,128,
112,96,80,64,
56,48,40,32
160,144,128,
112,96,80,64,
56,48,40,32,
24,16,8
48
48
320,256,192,
160,128,96,
80,64,48
192,160,128
Supported Mode
STEREO
JOINT STEREO
DUAL CHANNEL
SINGLE CHANNEL
STEREO
JOINT STEREO
DUAL CHANNEL
SINGLE CHANNEL
STEREO
SINGLE CHANNEL
STEREO
STEREO
DISC NOTE
A. Notes on discs:
1.Attempting to use non-standard shape
discs (e.g. square, start, heart) may
damage the unit. Be sure to use round
shape CD discs only for this unit.
2.Do not stick paper or tape etc., onto
the label side or the recording side of
any discs, as it may cause a
malfunction.
3.Dirt, dust, scratches and warping discs
will cause misoperation.
B. Notes on CD-Rs (recordable
CDs)/CD-RWs (rewritable CDs):
1.Be sure to use discs with following
marks only for the unit to play:
2.The unit cannot play a CD-R and
CD-RW that is not finalized.
(Please refer to the manual of your
CD-R/CD-RW recorder or CD-R/
CD-RW software for more information
on finalization process).
3.Depending on the recording status,
conditions of the disc and the
equipment used for the recording,
some CD-Rs/CD-RWs may not be
played on this unit. (See *1)
*1: To have more reliable play back,
please see following
recommendations:
a.Use CD-RWs with speed 1x to 4x
and write with speed 1x to 2x.
b.Use CD-Rs with speed 1x to 8x and
write with speed 1x to 2x.
c.Do not play a CD-RW which has
been written for more than 5 times.
C. Notes on MP3 files (MP3 Version
Only):
1.The disc must be in the ISO9660 level
1 or level 2 format, or Joliet or Romeo
in the expansion format.
2.When naming a MP3 file, be sure the
file name extension is “.MP3”.
3.For a non-MP3 file, even though the
file name extension is “.MP3”, the unit
cannot recognize it.
11
Recordable Rewritable
OPERATION