Clarion CMD5 manual What is MP3?, What is WMA?, Precautions when creating MP31 WMA files

CDIMP3IWMA Operations

MP3IWMA

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 playa file with DRM (Digital Rights Management) for WMA remaining ON, no audio is output (The WMA indicator blinks).

•Windows Media TM, 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 9, click on TOOL ... OPTIONS'"MUSIC RECORD tab, then under Recording settings, uncheck the Check box for RECORD PROTECTED MUSIC. Then, reconstruct files.

Personally constructed WMA files are used at your own responsibility.

2.When using Windows Media Player 10, click on TOOLS'"OPTIONS'"RIP MUSIC tab, then under RIP SETTINGS, uncheck the Check box for COPY PROTECT MUSIC. Then, reconstruct files.

Personally constructed WMA files are used at your own responsibility.

Precautions when creating MP31 WMA files

•Usable sampling rates and bit rates

•MP3: Sampling rate 11.025 kHz-48 kHz,

Bit rate 8 kbps-320 kbps I VBR

•WMA: Bit rate 48 kbps-1 92 kbps

•File extensions

•Always add a file extension ".MP3" or ".WMA" to MP3 or WMA 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.

•Files without MP3IWMA data will not play. The indication "--:--" appears in the play time display if you attempt to play files without MP31 WMA data.

•Logical format (File system)

•When writing MP3IWMA file on a CD-R disc or CD-RW disc, please select "1509660 level 1, 2 or JOLIET or Romeo" as the writing software format. Normal play may not be possible if the disc is recorded on another format.

•The folder name and file name can be displayed as the title during MP3IWMA play but the title must be within 128 single byte alphabetical letters and numerals (including an extension) .

•Do not affix a name to a file inside a folder having the same name.

•Folder structure

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

•Number of files or folders

•Up to 255 files can be recognized per folder. Up to 512 files can be played.

•Tracks are played in the order that they were recorded onto a disc (Tracks might not always be played in the order displayed on the PC).

•Some noise may occur depending on the type of encoder software used while recording.