Clarion iDXZ775USB CD/MP3/WMA/AAC Operations, What is MP3?, What is WMA?, What is AAC?

CD/MP3/WMA/AAC Operations

English

MP3/WMA/AAC

What is MP3?

MP3 is an audio compression method and classified into audio layer 3 of MPEG standards. This audio compression method has penetrated into PC users and become a standard format.

This MP3 features the original audio data compression to about 10 percent of its initial size with a high sound quality. This means that about 10 music CDs can be recorded on a CD- R disc or CD-RW disc to allow a long listening time without having to change CDs.

What is WMA?

WMA is the abbreviation of Windows Media Audio, an audio file format developed by Microsoft Corporation.

Notes:

•If you play a file with DRM (Digital Rights Management) for WMA remaining ON, no audio is output (The WMA indicator blinks).

•Windows Media™, and the Windows ® logo are trademarks, or registered trademarks of Microsoft Corporation in the United States and/or other countries.

●To disable DRM (Digital Rights Management)

1.When using Windows Media Player 8, click on TOOLS ➜ OPTIONS ➜ COPY MUSIC tab, then under COPY SETTINGS, unclick the check box for PROTECT CONTENT.

Then, reconstruct files.

2.When using Windows Media Player 9, click on TOOL ➜ OPTIONS ➜ MUSIC RECORD tab, then under Recording settings, unclick the Check box for RECORD PROTECTED MUSIC. Then, reconstruct files.

Personally constructed WMA files are used at your own responsibility.

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 conditions can be played:

-AAC files encoded with iTunes.

-iTunes Ver. 7.0 or earlier.

-File extension “.m4a” (“.M4A”)

•Tracks purchased at an iTunes Music 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 encoded.

Precautions when creating MP3/ WMA/AAC disc

●Usable sampling rates and bit rates 1. MP3: Sampling rate 8 kHz–48 kHz,

Bit rate 8 kbps–320 kbps / VBR

2. WMA: Bit rate 32 kbps–192 kbps

3. AAC: Sampling rate 8 kHz–48 kHz, Bit rate 8 kbps–320 kbps / VBR

●File extensions

1.Always add a file extension “.MP3” (.mp3), “.WMA” (.wma) or “.M4A” (.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 “– –:––” appears in the play time display if you attempt to play files without MP3/WMA/AAC data.

●Logical format (File system)

1.When writing MP3/WMA/AAC file on a CD-R disc or CD-RW disc, please select “ISO9660 level 1, 2 or JOLIET or Romeo or APPLE ISO” as the writing software format. Normal play may not be possible if the disc is recorded on another format.

2.The folder name and file name can be displayed 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.

●Folder structure

1.A disc with a folder having more than 8 hierarchical levels will be impossible.

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