Mp3 & wma overview – SoundMax SM-CMD3002 User Manual

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MP3 & WMA overview

Notes on MP3 and WMA:

MP3 is short for MPEG Audio Layer 3 and refers to an audio compression technology standard.
This product allows playback of MP3 files on CD-ROM, CD-R or CD-RW discs.

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.
The unit can not read an MP3 file that has a file extension other than “.mp3”.
If you play a non- MP3 file that has the “.mp3” extension, you may hear some noise.
In this manual, we refer to what are called “MP3 file” and “folder” in PC terminology as “track” and “album”,

respectively.
Maximum number of directory level is 8, including the root directory. Maximum number of files and folders
per disc is 256.
The unit may not play tracks in the order of Track numbers.

The unit plays only the audio tracks if a disc contains both audio tracks and MP3 files.
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.
The unit supports the playback of WMA files. The playback of ID3 tags for WMA format is not guaranteed, it

depends on versions and availability of Cyrillic alphabet.
WMA (Windows Media Audio) – music data compression format, created by Microsoft Corporation. This
format uses coding algorithm for compression of initial audio-record, greatly decreasing the file size, but,
saving the good sound quality even when the bit rate is low (for example, 64 Kbit/s).

Remember that the unit may not play the tracks in order they are written on disc.

Notes on creating your own CD-Rs or CD-RWs containing MP3 files
-

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.

DO NOT store more than 256 MP3 files per disc.

For ISO 9660 - compliant format, the maximum allowable depth of nested folders is 8, including the root
directory (folder).

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

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.