English | 7About AAC, MP3 and WMA (KDC-MP4028/KDC-MP428)The playable AAC/MP3/WMA file (hereafter calledAudio file) and the media format has the followinglimitation. The Audio file, which is out of thespecification, may not able to be played normally,or the file and folder names may not be displayedcorrectly.Playable Audio file• AAC, MP3, WMA: KDC-MP4028/KDC-MP428• Attach the correct extension for the Audio file (AAC:".M4A", MP3: ".MP3", WMA: ".WMA")• Do not attach the extensions to the other files besidesthe Audio file. If it is attached, the file, which is not theAudio file, will be played and outputs the loud noise, andthen the speaker will be damaged.• The files with copy protection cannot be played.Playable AAC file• ".m4a" file encoded by AAC-LC format.Refer tohttp://www.kenwood.mediamanager.jpfor the details.Playable MP3 file• MPEG 1/2 Audio Layer 3 file• Transfer bit rate: 8-320 kbps• Sampling frequency: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 kHzPlayable WMA file• The file in accordance with Windows Media Audio(Except for the file for Windows Media Player 9 orafter which applies the new functions)• Transfer bit rate: 48-192 kbps• Sampling frequency: 32, 44.1, 48 kHzPlayable media• CD-ROM, CD-R, CD-RW (CD-RW with quick formatcannot be used.)• When recording to the media up to the maximumcapacity at once, the writing soft is set to "Disc at once".Playable disc format• ISO 9660 Level 1/2• Joliet• Romeo• Long file name.The maximum number of characters fordisplayFile/Folder name: 64 charactersMP3 ID3 Tag/ WMA Contents property:30 characters• File/Folder name is the number of the charactersincluding the extensions• MP3 ID3 Tag can only display the tag of Ver1.XLimitation of structure for the file and thefolder• Maximum number of directory levels: 8• Maximum number of folders: 100• Maximum number of files per folder: 255Playing order of the Audio fileThe Audio file is played in the order which is writtenby writing soft. You may be able to set the playingorder by writing the play sequence numbers suchas "01" to "99" at the beginning of the file name.ExampleCD¡!¡"2(1) 0: Folder¡: Audio file3¡%4¡#¡$• Playing orderPlaying order after ¡! play.➡ ¡", ¡#, ¡$, ¡%...• File searchForward file search during ¡# play.Push the Control knob to [¢] ➡ ¡$• Folder searchForward folder search during ¡" play.Push the Control knob to [FM] ➡ 3, 4...• Folder selectWhen it is set to directory 4, skip to the folderbefore the same level by folder select.Push the Control knob to [4] ➡ 2When it is set to directory 3, makes the level upby folder select.Push the Control knob to [AM] ➡ 2