–Discs are dirty or scratched.

–Moisture condensation occurs on the lens inside the unit.

–The pickup lens inside the unit is dirty.

–CD-R/CD-RW on which the files are written with “Packet Write” method.

–There are improper recording conditions (missing data, etc.) or media conditions (stained, scratched, warped, etc.).

•CD-RWs may require a longer readout time since the reflectance of CD-RWs is lower than that of regular CDs.

•Do not use the following CD-Rs or CD-RWs:

–Discs with stickers, labels, or a protective seal stuck to the surface.

–Discs on which labels can be directly printed by an ink jet printer.

Using these discs under high temperatures or high humidities may cause malfunctions or damage to the unit.

Playing an MP3/WMA/AAC disc

•This unit can play back MP3/WMA/AAC files with the extension code <.mp3>, <.wma>, or <.m4a> (regardless of the letter case—upper/lower).

•This unit can show the names of albums, artists (performer), ID3 Tag (Version 1.0, 1.1, 2.2, 2.3, or 2.4) for MP3, and show WMA/AAC Tag.

•This unit can display only one-byte characters. No other characters can be correctly displayed.

•This unit can play back MP3/WMA/AAC files meeting the conditions below:

–Bit rate of MP3: 8 kbps — 320 kbps

–Sampling frequency of MP3:

48 kHz, 44.1 kHz, 32 kHz (for MPEG-1)

24 kHz, 22.05 kHz, 16 kHz (for MPEG-2) 12 kHz, 11.025 kHz, 8 kHz (for MPEG-2.5)

–Bit rate of WMA: 16 kbps — 32 kbps

(Sampling frequency: 22.05 kHz) 32 kbps — 320 kbps (Sampling frequency: 48 kHz, 44.1 kHz, 32 kHz)

–Bit rate of AAC: 16 kbps — 320 kbps

–Sampling frequency of AAC: 48 kHz, 44.1 kHz

–Disc format: ISO 9660 Level 1/Level 2, Romeo, Joliet, Windows long file name

•The maximum number of characters for file/folder names vary among the disc format used (includes 4 extension characters—<.mp3>, <.wma>, or <.m4a>).

–ISO 9660 Level 1: up to 12 characters

–ISO 9660 Level 2: up to 31 characters

–Romeo*: up to 128 (60) characters

–Joliet*: up to 64 (30) characters

–Windows long file name*: up to 128 (60)

characters

*The parenthetic figure is the maximum number of characters for file/folder names in case the total number of files and folders is 271 or more.

•This unit can recognize a total of 512 files, of 200 folders, and of 8 hierarchies.

•This unit can play back files recorded in VBR (variable bit rate).

Files recorded in VBR have a discrepancy in elapsed time display, and do not show the actual elapsed time. Especially, after performing the search function, this difference becomes noticeable.

•This unit cannot play back the following files:

–MP3 files encoded with MP3i and MP3 PRO format.

–MP3 files encoded in an inappropriate format.

–MP3 files encoded with Layer 1/2.

–WMA files encoded with lossless, professional, and voice format.

–WMA files which are not based upon Windows Media® Audio.

–WMA files copy-protected with DRM.

–AAC files created by any other application than iTunes.

–AAC files encoded with Apple lossless format.

–Files which have the data such as AIFF, ATRAC3, etc.

•The search function works but search speed is not constant.

Continued on the next page

ENGLISH

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JVC KD-G731 manual Playing an MP3/WMA/AAC disc, Bit rate of MP3 8 kbps 320 kbps Sampling frequency of MP3, Characters
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KD-G731 specifications

The JVC KD-G731 is an advanced CD receiver that has earned recognition for its blend of innovative features, cutting-edge technology, and user-friendly design. This model offers an array of functionalities that cater to audiophiles and casual listeners alike, making it a popular choice for in-car audio systems.

One of the standout features of the KD-G731 is its playback capability. The receiver is equipped with a CD player that supports a variety of disc formats, including CD-R and CD-RW, allowing users to enjoy their favorite albums and homemade compilations. Additionally, the device features an auxiliary input, making it easy to connect portable music players, smartphones, and other external media devices.

The KD-G731 also stands out with its digital media playback options. It includes a USB port that enables direct connection to USB devices, allowing users to play music files stored on USB flash drives. The receiver supports various audio file formats, including MP3 and WMA, ensuring flexibility for different music libraries.

Audio performance is enhanced by the built-in 24-bit digital-to-analog converter (DAC), which delivers clear and high-quality sound playback. The AKM DAC ensures that audio is reproduced accurately, enhancing the listening experience whether users are enjoying their favorite songs or tuning into radio stations.

The receiver incorporates a high-output amplifier that provides powerful sound, efficiently driving speakers while maintaining clarity. With a 4-channel speaker output, the KD-G731 allows users to build a robust sound system in their vehicles. Moreover, the receiver comes with a built-in equalizer, allowing users to customize the sound to their liking, with presets that include flat, rock, pop, and classical settings.

The design of the KD-G731 emphasizes both functionality and aesthetics. The front panel features a detachable design for added security, while an easily readable display offers clear visibility of track information and settings. User-friendly controls are laid out intuitively, providing quick access to essential functions without distraction while driving.

In terms of connectivity, the KD-G731 features a radio tuner that provides access to both AM and FM bands, with programmable presets to save favorite stations. The receiver also includes built-in support for RDS (Radio Data System), which delivers additional information about broadcasted radio content.

Overall, the JVC KD-G731 stands out as a versatile and feature-rich CD receiver capable of delivering an impressive audio experience for any driver. With its variety of playback options, high-quality audio performance, and user-friendly interface, it remains a highly regarded choice in car audio solutions.
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