English | USB Operations |
Coding” and refers to the audio compression | |
| What is AAC? |
| AAC is an acronym for “Advanced Audio |
| method used with video compression standards |
| |
| AAC files composed with the following condi- |
| tions can be played: |
| AAC files encoded with iTunes. |
| iTunes Ver. 7.0 or earlier. |
| File extension “.m4a” (“.M4A”) |
| Tracks purchased at an iTunes Store, and |
| |
| When playing AAC files that include image data, |
| additional time may be required before playback |
| begins. |
| Files may not play properly, depending on the |
| iTunes version under which an AAC file is en- |
| coded. |
Precautions when creating MP3/ WMA/AAC file
Usable sampling rates and bit rates See “USB” (page 43) for details.
File extensions
1. Always add a file extension “.MP3”, “.WMA” or “.M4A” to MP3, WMA or AAC file by using single byte letters. If you add a file extension other than specified or forget to add the file extension, the file cannot be played.
2. Files without MP3/WMA/AAC data will not play. The indication “NO FILE” appears in the play time display if you attempt to play files without MP3/WMA/AAC data.
∗ When VBR files are played, the play time display may differ the play location.
∗ When MP3/WMA/AAC files are played, a little no sound part is caused between tunes.
Logical format (File system)
1. When writing MP3/WMA/AAC file, please select “FAT12”, “FAT16” or “FAT32” as the file system format. Normal play may not be possible if the files are recorded on another format.
2. The folder name and file name can be dis- played as the title during MP3/WMA/AAC play but the title must be within 64 single byte alphabetical letters and numerals (including an extension).
3. Do not affix a name to a file inside a folder having the same name.
Note:
File names in small letters with less than 8 charac- ters (not including file extension) will be displayed in capital letters.
Folder structure
1. A USB with a folder having more than 8 hier- archical levels will be impossible.
Number of files or folders
1. Up to 255 files per folder can be recognized. Up to 512 folders can be recognized and up to total of 130560 files can played.
2. Tracks are played in the order that they were recorded onto a USB. (Tracks might not always be played in the order displayed on the PC.)
3. Some noise may occur depending on the type of encoder software used while recording.
!CAUTION
Insert and remove a USB memory device only when the device is not being accessed. Connecting or disconnecting the device at the following times may result in the loss of data:
-If the USB memory device is removed or power is disconnected during writing to the device.
-When the device is subjected to static electricity or electric noise.
Do not leave a USB memory device unat- tended in an automobile. Exposure to direct sunlight or high temperatures may cause deformation or other malfunction of the USB memory device.
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