24 english, Caution, Usb operations – Clarion FZ709E User Manual

Page 20: Precautions when creating mp3/ wma/aac file, What is aac

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24

English

FZ709E

USB Operations

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.

Folder structure

1. A USB with a folder having more than 8 hier-

archical levels will be impossible.

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.

Precautions when creating MP3/

WMA/AAC file

Usable sampling rates and bit rates

See “USB” (page 43) for details.

What is AAC?

AAC is an acronym for “Advanced Audio

Coding” and refers to the audio compression

method used with video compression standards

MPEG-2 and MPEG-4.

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

copyright-protected files cannot be played.

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.

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.

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