Audio Files (MP3/WMA/AAC)
Comfort controls 7-33
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N00715900033
MP3 is an abbreviation of “MPEG-1 Audio Layer 3”. MPEG is an abbreviation of“Motion Picture Experts Group”, and this is a video compression stan
dard used in video
CDs, etc.MP3 is one of the audio compression meth- ods contained in the MPEG audio standard, and reduces the quality of sounds that arebeyond the auditory resolution of the humanear and that are hidden by louder sounds, thus creating high-quality data with a lower data size.Because this can compress CD audio to approximately 1/10 its original data size with- out perceptible loss, approximately 10 CDscan be written to a single CD-R/RW disc. Specifications for MP3 files that can be played are as below.
Maxi- mum file num- ber
*1
65,535 files (total number on media. Other than MP3, WMA, and AAC files not included)
File
name and folder name restric- tions
Maximum 64 bytes (for Uni- code, 32 characters), files/ fold- ers with file/ folder names longer than this will not be dis-played or played back.
USB sup- ported formats
The recommended file system is FAT32.1 partition only
*1: Do not include other than MP3/WMA/AAC files. However, if stor- ing many tracks within the same folder, these may not be recognized even if lessthan the maximum number of tracks. In these cases, divide the tracks up into mul- tiple folders.
NOTE
The order in which folders and audio files are displayed on this product may be differ-ent than how they are displayed on a com- puter.Name
Speci- fica- tion
Explanation
What Is MP3?
CAUTION MP3 files different to the standards at right may not play back correctly, or file/folder names may not be displayed correctly.
Standards for MP3 Files That Can Be Played Back
Item
Details
Specification MPEG-1 AUDIO LAYER3
MPEG-2 AUDIO LAYER3
Sampling frequency [kHz]
MPEG-1: 32/44.1/48 MPEG-2: 16/22.05/24
Bit rate [kbps]
MPEG-1: 32 to 320 MPEG-2: 8 to 160
VBR (vari- able bit rate)
Support
Channel mode
Stereo/ Joint stereo/ Dual channel/ Mono
File exten-
sion
mp3
Supported tag informa-
tion
ID3 tag Ver. 1.0, Ver. 1.1, Ver. 2.2, Ver. 2.3, Ver. 2.4 (ISO-8859-1, UTF-16 (Uni- code)), Titles, Artist name, Album name
Maximum number of characters that can be indicated on the display
64 characters
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Audio Files (MP3/WMA/AAC) 7-34 Comfort controls
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N00716000031
WMA is an abbreviation of Windows Media Audio, and this is an audio compression for-mat from Microsoft. This is a compression format that has a higher compression ratio than MP3. Specifications for WMA files that can be played are as below.
N00716100032
AAC is an abbreviation of Advanced AudioCoding, and this is an audio compression standard used in “MPEG-2” and “MPEG-4”. This features 1.4x the compression of MP3,with comparable audio quality.
Specifications for AAC files that can be played are as below.
What Is WMA?
NOTE
Microsoft, Windows Media, and Windows are registered trademarks of Microsoft Cor-poration (USA) and in other countries.CAUTION WMA supports digital rights management (DRM). This product cannot play backWMA files protected using this system. WMA files different to the standards at right may not play back correctly, or file/folder names may not be displayed correctly. “Pro”, “Lossless”, and “Voice” are not sup- ported.
Standards for WMA Files That Can Be Played Back
Item
Details
Specification Windows Media Audio
Version7.0/8.0/9.0
Sampling fre- quency [kHz]
32/44.1/48
Bit rate [kbps] 48 to 320
VBR
(variable bit rate)
Support
Channel mode Stereo/Mono File extension wmaSupported tag information
WMA tags Title name, Artist name, Album name
Maximum num- ber of characters that can be indi- cated on the dis-
play
64 characters
What Is AAC?
CAUTION AAC supports digital rights management (DRM). This product cannot play back AAC files protected using this system. AAC files different to the standards at right may not play back correctly, or file/folder names may not be displayed correctly.
Standards for AAC Files That Can Be Played Back
Item
Details
Specification Advanced Audio
Coding MPEG4/AAC-LC MPEG2/AAC-LC
Sampling
fre- quency [kHz]
MPEG4 8/11.025/12/16/22.05/
24/32/44.1/48
MPEG2 8/11.025/12/16/22.05/
24/32/44.1/48
Bit rate [kbps]
MPEG4 8 to 320 MPEG2 8 to 320
VBR
(variable bit rate)
Support
Channel mode Stereo/Mono
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General information about your radio 7-64 Comfort controls
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If one listens to a weak station and is in the vicinity of another strong station, both sta-tions might be received simultaneously. Stereo reception requires a high quality broadcast signal. This means that types ofdisturbances mentioned previously become more marked and the reception range is somewhat diminished during stereo recep-tion.
FM reception is affected by the electrical sys- tems of vehicles in the vicinity, especiallythose without an electro
nic noise suppression
device. The disturbance is even greater if the station is weak or poorly tuned.FM reception is not as sensitive to electrical disturbances as AM. AM reception is sensi- tive to electrical disturbances such as powerlines, lightning and other types of similarelectrical phenomena.
Cross modulation FM stereo reception
Causes of disturbances
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