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3-2. Using the audio system
3
Interior features
SEQUOIA_U_(L/O_0804)
n MP3 and WMA files
MP3 (MPEG Audio LAYER3) is a standard audio compression format.
Files can be compressed to approximately 1/10 of their original size by using
MP3 compression.
WMA (Windows Media
®
Audio) is a Microsoft
®
audio compression format.
This format compresses audio data to a size smaller than that of the MP3
format.
There is a limit to the MP3 and WMA file standards and to the media/formats
recorded by them that can be used.
l MP3 file compatibility
• Compatible standards
MP3 (MPEG1 LAYER3, MPEG2 LSF LAYER3)
•Compatible sampling frequencies
MPEG1 LAYER3: 32, 44.1, 48 (kHz)
MPEG2 LSF LAYER3: 16, 22.05, 24 (kHz)
•Compatible bit rates (compatible with VBR)
MPEG1 LAYER3: 64, 80, 96, 112, 128, 160, 192, 224, 256, 320 (kbps)
•MPEG2 LSF LAYER3: 64, 80, 96, 112, 128, 144, 160 (kbps)
•Compatible channel modes: stereo, joint stereo, dual channel and
monaural
l WMA file compatibility
• Compatible standards
WMA Ver. 7, 8, 9
•Compatible sampling frequencies
32, 44.1, 48 (kHz)
•Compatible bit rates (only compatible with 2-channel playback)
Ver. 7, 8: CBR 48, 64, 80, 96, 128, 160, 192 (kbps)
Ver. 9: CBR 48, 64, 80, 96, 128, 160, 192, 256, 320 (kbps)
l Compatible media
Media that can be used for MP3 and WMA playback are CD-Rs and CD-
RWs.
Playback in some instances may not be possible, depending on the status
of the CD-R or CD-RW. Playback may not be possible or the audio may
jump if the disc is scratched or marked with fingerprints.
SEQUOIA_U.book Page 289 Friday, January 25, 2008 11:27 AM
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