AVN4400 Online Manual

MP3/WMA

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MP3 (MPEG Audio Layer 3) is a standard format for audio compression technology. By using MP3, a file can be compressed to one-tenth the size of the original.

WMA (Windows Media™ Audio) is the Microsoft's voice compression technology. WMA files can be compressed to a size smaller than MP3 files.

This receiver accepts certain MP3/WMA file standards, recorded media and formats. Use the following notes when you write MP3/WMA files on a disc.

Playable MP3 File Standards

  • Supported standards:

  • MPEG Audio Layer 3 (=MPEG1 Audio Layer III, MPEG2 Audio Layer III, MPEG2.5 Audio Layer III)

  • Supported sampling frequencies:

  • 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 (kHz)

  • Supported bit rates:

  • 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 192, 224, 256, 320 (K bps)

  • Supports VBR.

  • Does not support free format.

  • The MPEG-1 and MPEG-2 standards define different bit rates.

  • Supported channel modes:

  • Stereo, Joint Stereo, Dual channels, Monaural

Playable WMA File Standards

  • Supported standards:

  • WMA Ver. 9 Standard Decoder Class 3 satisfied

  • Supported sampling frequencies:

  • 22.05, 32, 44.1, 48 (kHz)

  • Supported bit rates:

  • 20, 22, 32, 36, 40, 44, 48, 64, 80, 96, 128, 160, 192, 256, 320 (K bps)

  • Supports VBR. (5 to 320K bps)

  • Does not support lossless compression.

ID3/WMA Tags

You can store ID3/WMA tag character information such as track titles and artist names in an MP3 and a WMA file.

This receiver supports ID3v.1.0 and ID3v.1.1 tags. This receiver supports the ISO-8859-1 codes only. Use only the ISO-8859-1 codes to record tags. If characters not included in ISO-8859-1 codes are recorded, their display may be unreadable.

This receiver supports the WMA tag ASF revision (v1.20.02). WMA tags having only Unicode are supported. Always use Unicode characters to enter the information.

Supported Media Types

You can play MP3/WMA files recorded on a CD-ROM, CD-R, CD-RW, DVD±R or DVD±RW disc. Compared to CD-ROM media commonly used for music discs, CD-R and CD-RW discs are fragile in high temperature/high humidity environments and one section of the CD-R/CD-RW may become incapable of playback. Fingerprints or scratches on the disc may prevent playback or cause skipping during playback.

Sections of CD-R/CD-RW may deteriorate if left inside a vehicle for long periods of time.

We recommend that you store UV-sensitive CD-R and CD-RW discs in shield cases.

Format of Discs

You can use the following format discs on the player.

  • CD-ROM formats:

  • CD-ROM Mode 1, CD-ROM XA Mode 2 (Form 1)

  • File formats:

  • ISO 9660 Level 1 or Level 2 (for both CD and DVD discs)

  • ROMEO system, JOLIET system

  • MP3/WMA files recorded in a format other than the one explained above may result in files that cannot be played normally and in file names and folder names that do not display properly.

  • Limitations in addition to standards are as follows.

  • Maximum directory layers:

  • 8 layers

  • Maximum characters for folder and file names:

  • 30 characters (including delimiter “.” and 3 characters of file extension) for MP3, but 15 characters (including delimiter “.” and 3 characters of file extension) for WMA.

  • Supported characters for folder and file names:

  • A to Z, 0 to 9, and underscore (_)

  • Number of files that can be stored on a single disc:

  • 999 files

  • Number of folders that can be stored on a single disc:

  • 255 files

[MP3/WMA configuration example]

File Names

Only a file with the “mp3” or “wma” extension is recognized as an MP3 or WMA file. Always save an MP3/WMA file with the “mp3”/“wma” extension.

The “mp3” or “wma” file extension must be single-byte uppercase letters.

Attention

If a non-MP3/WMA file has the “mp3” or “wma” file extension, it may be recognized erroneously as an MP3/WMA file. When such file is played, the very large noise is output and speakers may be damaged. Do not save a non-MP3/WMA file with the “mp3” or “wma” extension.

Multi-sessions

Multisessions are supported and CD-R/RW with recorded MP3/WMA files can be played.

When written with “Track at once”, however, finalize the disc with session close or write protect.

Playing MP3/WMA

When you load a disc with MP3/WMA files, the system first checks all files recorded on the disc. If the disc has many files and folders, the system may take a certain time to check them.

While the system is checking the disc, the music that had been playing continues to play.

To quickly check files, we recommend that you do not save non-MP3/WMA files and not to create unnecessary folders on the disc.

Also, we recommend you to write the entire data in a single session as the system takes a longer time to read the CD control information of a multi-session disc.

MP3/WMA Playing Time Display

It is possible that playing time will not be correct, depending on the writing condition of the MP3/WMA file.

  • It is possible that playing time will not be correct when VBR Fast Up/Down is operated.

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