About AAC, MP3 and WMA

The playable AAC/MP3/WMA file (hereafter called Audio file) and the media format has the following limitation. The Audio file, which is out of the specification, may not able to be played normally, or the file and folder names may not be displayed correctly.

¥Attach the correct extension for the Audio file (AAC: ".M4A", MP3: ".MP3", WMA: ".WMA")

¥Do not attach the extensions to the other files besides the Audio file. If it is attached, the file, which is not the Audio file, will be played and outputs the loud noise, and then the speaker will be damaged.

¥The files with copy protection cannot be played.

Playable AAC file

¥".m4a" file encoded by AAC-LC format.

Refer to http://www.kenwood.mediamanager.jp for the details.

Playable MP3 file

¥MPEG 1/2 Audio Layer 3 file

¥Transfer bit rate: 8-320 kbps

¥Sampling frequency

KDC-W7031: 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 kHz

KDC-W8531/W7531: 16, 22.05, 24, 32, 44.1, 48 kHz

Playable WMA file

¥The file in accordance with Windows Media Audio (Except for the file for Windows Media Player 9 or after which applies the new functions)

¥Transfer bit rate: 48-192 kbps

¥Sampling frequency: 32, 44.1, 48 kHz

Playable media

¥CD-ROM, CD-R, CD-RW

¥Depending on the writing software, it may not be possible to use quick formatted CD-RW discs.

¥When recording to the media up to the maximum capacity at once, the writing soft is set to "Disc at once".

Playable disc format

¥ISO 9660 Level 1/2

¥Joliet

¥Romeo

¥Long file name.

The maximum number of characters for display

File/Folder name: KDC-W7031: 64 characters

KDC-W8531/W7531: 128 characters MP3 ID3 Tag/ WMA Contents property/

AAC song information (KDC-W8531/W7531 only): 30 characters

8 English

¥File/Folder name is the number of the characters including the extensions.

¥MP3 ID3 Tag can only display the tag of Ver1.X. (KDC- W7031 only)

¥AAC ID3 Tag cannot be displayed.

Limitation of structure for the file and the folder

¥Maximum number of directory levels: 8

¥Maximum number of folders: 100

¥Maximum number of files per folder: KDC-W7031: 255 KDC-W8531/W7531: 4096

Playing order of the Audio file

The Audio file is played in the order which is written by writing soft. You may be able to set the playing order by writing the play sequence numbers such as "01" to "99" at the beginning of the file name.

Example

CD (1) 0: Folder ¡: Audio file

¡!

2¡"

3 ¡# ¡$

4¡%

Playing order

Playing order after ¡! play.

¡", ¡#, ¡$, ¡%...

File search

Forward file search during ¡# play. Push the Control knob to [¢] ¡$

Folder search

Forward folder search during ¡" play. Push the Control knob to [FM] 3, 4...

Folder select

When it is set to directory 4, skip to the folder before the same level by folder select.

Push the Control knob to [4] 2

When it is set to directory 3, makes the level up by folder select.

Push the Control knob to [AM] 2

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Kenwood KDC-W8531, KDC-W7531, KDC-W7031 instruction manual About AAC, MP3 and WMA

KDC-W8531, KDC-W7031, KDC-W7531 specifications

The Kenwood KDC-W7531, KDC-W7031, and KDC-W8531 are a trio of car audio receivers that exemplify the brand's commitment to innovation, sound quality, and ease of use. These models cater to a diverse range of listening preferences, ensuring a satisfying audio experience for drivers and passengers alike.

The KDC-W7531 stands out with its powerful audio output, seamlessly blending advanced technologies to deliver a superior sound experience. One of its defining features is the built-in CD player, providing easy access to physical media along with compatibility for MP3, WMA, and AAC files. Additionally, it includes a USB port that enables direct connection to iPods and other USB devices, allowing users to enjoy their favorite music collections effortlessly. The high-quality 24-bit digital-to-analog converter enhances audio playback, ensuring pure sound reproduction with reduced distortion.

The KDC-W7031, while slightly more entry-level, does not compromise on essential features. It includes AM/FM radio, a single CD player, and the same USB connectivity options found in the W7531. Both models also boast integrated Bluetooth capabilities, facilitating hands-free calling and wireless music streaming from compatible devices. The inclusion of a three-line display ensures that information such as track titles and artist names is visible and easy to read.

Next in line is the KDC-W8531, which brings additional perks suited for audiophiles. This model supports high-resolution audio playback and features a dedicated subwoofer output, providing users with the ability to elevate their sound system further. The KDC-W8531 also includes a high-pass and low-pass filter, allowing for more tailored audio settings. Its intuitive interface, complemented by customizable color options for its display and buttons, ensures that users can personalize their listening experience.

In terms of connectivity, all three models support various formats, making them versatile choices for music aficionados. Whether users prefer traditional CDs, digital files, or streaming music, these receivers provide multiple avenues for enjoyment. The models also feature a built-in equalizer with preset options, enabling users to adjust the sound profile to match their music preferences or vehicle acoustics.

Moreover, each model is designed with ease of use in mind, featuring straightforward controls and a user-friendly interface. With their robust build quality and sleek aesthetics, the Kenwood KDC-W7531, KDC-W7031, and KDC-W8531 are ideal choices for anyone looking to enhance their in-car audio experience. These receivers encapsulate Kenwood's enduring dedication to performance and innovation in the automotive audio space.