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Mp3 overview – SoundMax SM-CMD2024 User Manual

Page 24

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MP3 overview

Notes on MP3
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MP3 is short for MPEG Audio Layer 3 and refers to an audio compression technology standard.

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This product allows playback of MP3 files on CD-ROM, CD-R or CD-RW discs.

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The unit can read MP3 files written in the format compliant with ISO 9660. However it does not support

the MP3 data written by the method of packet write.

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The unit can not read an MP3 file that has a file extension other than .mp3 .

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If you play a non- MP3 file that has the .mp3 extension, you may hear some noise.

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In this manual, we refer to what are called MP3 file and folder in PC terminology as track and

album , respectively.

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Maximum number of directory level is 8, including the root directory. Maximum number of files and
folders per disc is 256.

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The unit may not play tracks in the order of Track numbers.

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The unit plays only the audio tracks if a disc contains both audio tracks and MP3 files.

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When playing a disc of 8 kbps or VBR , the elapsed playing time in the display window will not be
correct and also the intro play may not function properly. VBR : Variable Bit Rate.

Notes on creating your own CD-Rs or CD-RWs containing MP3 files
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To enjoy high quality sound, we recommend converting to MP3 files with a sampling frequency of 44.1
kHz and a fixed bit rate o f 128 kbps.

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DO NOT store more than 256 MP3 files per disc.

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For ISO 9660 - compliant format, the maximum allowable depth of nested folders is 8, including the root

directory (folder).

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When CD-R disc is used, playback is possible only for discs, which have been finalized.

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Make sure that when MP3 CD-R or CD-RW is burned that it is formatted as a data disc and NOT as an
audio disc.

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You should not write non-MP3 files or unneeded folders along with MP3 files on the disc otherwise it

takes a long time until the unit starts to play MP3 files.

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With some CD-R or CD-RW media, data may not be properly written depending on their manufacturing
quality. In this case, data may not be reproduced correctly. High quality CD-R or CD-RW disc is
recommended.

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Up to 16 characters are displayed for the name of an Album or a Track. ID3TAG version 1.x is required.