24OperationMediaMedia capable of playing MP3/WMA includes CD-R and CD-RW discs. Compared to CD-ROMmedia commonly used for music discs, CD-R and CD-RW discs are fragile in high temperature/highhumidity environments and one section of the CD-R and CD-RW may become incapable ofplayback. Fingerprints or scratches on the disc may prevent playback or cause skipping duringplayback. Sections of a CD-R and CD-RW may deteriorate if left inside a vehicle for long periods oftime. It is also recommended that CD-R and CD-RW discs be kept in a light-blocking case becausethe discs are vulnerable to ultra-violet light.Format of discsThe format of discs to be used must be ISO9660 Level 1 or Level 2.Control items for this standard are as follows:• Maximum directory layers: 8 layers• Maximum characters for folder names/file names:32 (including "." and 3 letter file extension)• Allowable characters for folder names/file names:A~Z, 0~9, _ (underscore)• Number of files possible on a single disc: 999• Total number of folders possible on a single disc:255• Maximum folders this main unit can recognize: 256**: A root directory is counted as one folder.File namesOnly files with the MP3/WMA file extension ".mp3", ".wma" can be recognized as MP3/WMA and played.Be sure to save MP3 files with the ".mp3" file extension. Be sure to WMA files with the ".wma" fileextension. The "MP" letters of the file extension will be recognized whether entered as uppercase lettersor lowercase letters.CAUTIONIf the ".mp3", ".wma" file extension is attached to a file other than an MP3/WMA file, that file will bemistakenly recognized by the main unit as an MP3/WMA file and played, resulting in loud noiseoutput that can damage the speakers. Be sure to avoid attaching the ".mp3", ".wma" file extensionto files that are not MP3/WMA files.F2Root directory (F1)F158Folder 2Folder 158Folder 159F255 Folder 255001.mp3002.mp3003.mp3004.txt005.mp3001.mp3002.mp3F159[Configuration example for CD supporting MP3/WMA]Number of files possible on a single disc is 999.Files aside from MP3/WMA files (Example: 004.txt) also count as single files.
