Panasonic CQ-RX400U Notes on MP3/WMA/AAC, Playable Audio File, What is MP3/WMA/AAC?, Common

Notes on MP3/WMA/AAC

Notes on MP3/WMA/AAC

Playable Audio File

CQ-RX400U	MP3/WMA/AAC
CQ-RX200U	MP3/WMA
CQ-RX100U	MP3/WMA
CQ-RX100L	MP3/WMA

Notes for AAC playback is only for the model CQ-RX400U.

What is MP3/WMA/AAC?

MP3* (MPEG Audio Layer-3) and WMA (Windows MediaTM Audio) are the compression formats of digital audio. The former is developed by MPEG (Motion Picture Experts Group), and the latter is developed by Microsoft Corporation. Using these compression formats, you can record the contents of about 10 music CDs on a single CD media (This figures refer to data recorded on a 650 MB CD-R or CD-RW at a fixed bit rate of 128 kbps and a sampling frequency of 44.1 kHz).

*MPEG Layer-3 audio coding technology licensed from Fraunhofer.

AAC is an abbreviation for “Advanced Audio Coding”.

It has been defined as a standard for audio compression technology using MPEG 2 and MPEG 4.

Note: MP3/WMA/AAC encoding and writing software is not supplied with this unit.

Points to Remember When Making MP3/

WMA/AAC Files

Common

•High bit rate and high sampling frequency are recommended for high quality sounds.

•Selecting VBR (Variable Bit Rate) is not recommended because playing time is not displayed properly and sound may be skipped.

•The playback sound quality differs depending on the encoding circumstances. For details, refer to the instructions of your own encoding software and writing software.

MP3

•It is recommended to set the bit rate to “128 kbps or more” and “fixed”.

WMA

•It is recommended to set the bit rate to “64 kbps or more” and “fixed”.

•Do not set the copy protect attribute on the WMA file to enable this unit to play back.

AAC

•It is recommended to set the bit rate to “128 kbps or more” and “fixed”.

•The formats and extensions for AAC data vary according to the encoder software used.

•AAC files which can be played on this unit have the “.m4a” extension and were encoded with Apple iTunes® version 7.

•The file extension for files encoded with the iTunes Apple Lossless Encoder is “.m4a”, but such files cannot be played on this player.

•Files under copyright protection cannot be played.

Caution

Never assign the “.mp3”, “.wma” or “.m4a” file name extension to a file that is not in the MP3/ WMA/AAC format. This may not only produce noise from the speaker damage, but also damage your hearing.

iTunes is a trademark of Apple Inc., registered in the U.S. and other countries/regions.

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

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