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RAV4_OM_OM0R012U_(U)
415
5-16. Playing an audio CD and MP3/WMA/AAC discs
5
Audio system
■ MP3, WMA and AAC files
MP3 (MPEG Audio LAYER3) is a standard audio compression for-
mat.
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 for-
mat.
This format compresses audio data to a size smaller than that of
the MP3 format.
AAC is short for Advanced Audio Coding and refers to an audio
compression technology standard used with MPEG2 and MPEG4.
MP3, WMA and AAC file and media/formats compatibility are lim-
ited.
● 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: 32-320 (kbps)
MPEG2 LSF LAYER3: 8-160 (kbps)
• Compatible channel modes: stereo, joint stereo, dual channel
and monaural
● WMA file compatibility
• Compatible standards
WMA Ver. 7, 8, 9 (only compatible with Windows Media Audio
Standard)
• Compatible sampling frequencies
32, 44.1, 48 (kHz)
• Compatible bit rates (only compatible with 2-channel playback)
Ver. 7, 8: CBR 48-192 (kbps)
Ver. 9: CBR 48-320 (kbps)
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