MP3 file playback

MP3 (MPEG 1 Audio Layer-3) is a standard technology and format for compressing audio data. This allows a more efficient use of the media.

You can play MP3 files recorded on CD-ROMs, CD-Rs, and CD-RWs. The disc must be in the ISO 9660 level 1 or level 2 format, or Joliet or Romeo in the expansion format. You can also use a disc recorded in Multi Session.

ISO 9660 format

This is the most common international standard for the logical format of files and folders on a CD-ROM.

There are several specification levels. In Level 1, file names must be in the 8.3 format (no more than 8 characters in the name, no more than 3 characters in the extension У.MP3Ф) and in capital letters.

Folder names can be no longer than 8 characters. There can be no more than 8 folder levels (trees). Level 2 specifications allow file names up to 31 characters long.

Each folder can have up to 8 trees.

For Joliet or Romeo in the expansion format, please consider these restrictions when configuring your CD writing software.

Multi session

This is a recording method that enables adding of data using the Track-At-Once method.

Conventional CDs begin at a CD control area called the Lead-in and end at an area called Lead-out. A Multi Session CD is a CD having multiple sessions, with each segment from Lead-in to Lead-out regarded as a single session.

Х CD-Extra: The format that records audio (audio CD data) as tracks on session 1, and records data as tracks on session 2.

Х Mixed CD: In this format, data is recorded as track 1, and audio (audio CD data) is recorded as track 2.

File formats

Х With formats other than ISO 9660 level 1 and level 2, folder names or file names may not be displayed correctly.

Х When naming, be sure to add the file extension У.MP3Ф to the file name.

Х If you put the extension У.MP3Ф to a file other than MP3, the unit cannot recognize the file properly and will generate random noise that could damage your speakers.

Х The following discs take a longer time to start playback.

    Х a disc recorded with complicated tree structure.

    Х a disc recorded in Multi Session.

    Х a non-finalised disc to which data can be added.

Playing a multi session disc

When the first track of the first session is audio CD data

Only audio CD data of the first session is played back. Non-audio CD data/MP3 file information (track number, time, etc.) is displayed with no sound.

When the first track of the first session is not audio CD data

Х If an MP3 file is in the disc, only MP3 file(s) play back and other data is skipped. (Audio CD data is not recognised.)
Х If no MP3 file is in the disc, nothing is played back. (Audio CD data is not recognised.)

MP3 files playback order

The playback order of the folders and files is as shown.

Note: A folder that does not include an MP3 file is skipped.

Playback tip:

To specify a desired playback order, before the folder or file name, input the order by number (e.g., У01,Ф У02Ф), then record contents onto a disc. (The order differs depending on the writing software.)

ID3 Tag Version 2

ID3 Tag Version 2

The following occurs when an MP3 file containing ID3 tag ver.2 is played:

Х When skipping a portion of ID3 tag ver.2 (at the beginning of the track), sound is not output. Skip time changes depending ID3 tag ver.2 capacity. Example: At 64 kbytes, it is about 2 seconds (with RealJukebox).

Х The displayed elapsed playing time when skipping a portion of ID3 tag ver.2 is inaccurate. For MP3 files of a bit rate other than 128 kbps, time is not displayed accurately during playback.

Х When an MP3 file is created with MP3 conversion software (e.g.

RealJukebox - a registered trademark of RealNetworks Inc), ID3 ver.2 will automatically be written.

MP3 navigation

MP3 tracks may be recorded on the CD in several ways. They can all be placed in the root directory like a conventional audio CD, or they can be placed in folders that may represent, for example, an album, an artist, or a genre.

The normal playing sequence on CDs with multiple folders is to play the tracks within the root (top level) first, then the tracks in any folder(s) within the root, then move onto the second folder, and so forth.

Х Press the up or down arrow buttons to enter the track list.

Х Navigate the hierarchy using the arrow buttons to select another folder or track (file).

Х Press OK to select a highlighted track.

    See also:

    MP3 display options
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