Clarion MAX685BT MP3/WMA/AAC Operations, About the MP3/WMA/AAC files, What is MP3/WMA/AAC?

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MP3/WMA/AAC Operations

This system can playback MP3/WMA/AAC files recorded on a disc.

Owner’s manual

About the MP3/WMA/AAC files

What is MP3/WMA/AAC?

MP3, WMA, and AAC are the audio file formats which have penetrated into PC users and become a standard format.

MP3 is an audio compression method and classified into audio layer 3 of MPEG standards. WMA (Windows Media Audio) is an audio compression method developed by Microsoft Corporation.

AAC (Advanced Audio Coding) is a newer audio compression method developed for used with video compression standards MPEG-2 and MPEG-4, and has been adopted as the standard audio format of the iPod and iTunes by Apple Inc. These features compress the original audio data to about 10 percent of its initial size with a high sound quality. This means that about 10 audio CDs can be recorded on a CD-R/RW disc to allow a long listening time without having to change CDs.

Displaying MP3/WMA/AAC Tag titles

Tag information (track title, artist name, and album title) can be displayed for an MP3/WMA/ AAC file containing the Tag information.

This system supports the ID3 TAG version 1.x/ 2.x and WMA-TAG.

Note:

•Tag information entered with 2-byte characters may not be displayed properly on the display.

•The ID3 version 2.x tag format is not completely supported. This system can display information up to 60 bytes, and ignores the rest.

•Album titles of WMA-TAG may not be displayed properly.

Precautions on the MP3/WMA/AAC files

●General precautions

•Files other than MP3/WMA/AAC format cannot be played. In addition, some files may not be played because of the encoding settings. When a file cannot be played, the next file is played instead.

•Some noise may occur depending on the type of encoder software used to encode the data.

•You can apply the VBR (Variable Bit Rate) format when encoding. In this case, the displayed play time may be slightly different from the actual play time.

•Files that the DRM (Digital Rights Management) function is set cannot be played.

●For MP3 files

•Set the Sampling Frequency to:

•MPEG1 Layer3: 32, 44.1, or 48 kHz

•MPEG2 Layer3: 16, 22.05, or 24 kHz

•MPEG2.5 Layer3: 8, 11.025, or 12 kHz

•Set the Bit Rate to:

•MPEG1 Layer3: 32 to 320 kbps (VBR)

•MPEG2 Layer3: 8 to 160 kbps (VBR)

•MPEG2.5 Layer3: 8 to 160 kbps (VBR)

•Add a file extension “.MP3” or “.mp3” using single byte characters.

●For WMA files

•Set the Sampling Frequency to within ranges from 22.05 to 44.1 kHz.

•Set the Bit Rate to 48, 64, 80, 96, 128, 160, or 192 kbps.

•Add a file extension “.WMA” or “.wma” using single byte characters.

●For AAC files

•This system supports only the MPEG4 Audio files encoded by the iTunes.

•Set the Sampling Frequency to 44.1 or 48 kHz.

•Set the Bit Rate to within ranges from 16 to 320 kbps (VBR).

•Add a file extension “.M4A” or “.m4a” using single byte characters.